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P0300 Diagnostic Trouble Code Discussion for August 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2005 Porsche Cayenne 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WP1AA29P15
P0300: random/multiple cylinder misfire detected. ... months, can hear it popping trough intake. Pulled codes p0300 and p0304. I switched coils 3 and 4 and the problem still stayed on 4. I did a compression test 1-200,2-195,3-200,4-95,5-195,6-160. I sprayed some oil into # 4 spark plug hole and comp. went up ...
August 02, 2010
2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R7Y
P0300: Multiple Cylinder Misfire Detected. this car has the codes listed and you can not feel a misfire i do know that the maf and the coil pack were replaced along with the sparkplugs(found repair invoice in seat) scanner shows history misfires but no current we cleared light and drove several times o...
August 04, 2010
2004 Chrysler PT Cruiser 2.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on, MIL flash VIN: 3C4FY48B34
P0300: Multiple Cylinder Misfire Detected. Customer had vehicle towed in at the end of May this year at 64,494 miles stating mil illumninated at freeway speeds -vehicle started shaking like clutch was not disengaged. Vehicle did not stall but had no power to accelerate. Found related TSB indicating cam...
August 04, 2010
2006 Chevrolet Silverado 1500 LS 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 3GCEC14X16
P0300: Multiple Cylinder Misfire Detected. we have been all over this thing it is missing on 2,4,6 injector pulse is good on ye/bk(cylinder 6),l-bl/bk(4 cylinder),l-gn(2 cylinder). We dropped the exaust and there was no change ignition spark looks good. Fuel trims sht term is 2-6. All fuses have been c...
August 05, 2010
2002 Dodge Intrepid SE 2.7L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2C3HH46R32
P0300: Multiple Cylinder Misfire Detected. Fellow IATNers: My brother has a 2002 Intrepid 2.7 with a problem in the morning when they first start away. It starts and runs smoothly but when they start down the street it will not go over 40 kmph [25mph]. Sometimes it misses terribly and sometimes makes a...
August 05, 2010
2002 Nissan Maxima SE 3.5L Misfire, smokes VIN: JN1DA31DX2
P0300: Multiple Misfire Detected. ... need help.customer complaint is long crank,whitish gray smoke out exhaust that smells strongly of fuel and runs rough.when i first started the car it was missing and had the smoke that smells super strong of fuel.after a few minutes the miss cleared up and...
August 05, 2010
2003 Nissan Altima S 2.5L Misfire, MIL Lamp on VIN: 1N4AL11D75
P0300: Multiple Misfire Detected. Hi to all...Just wanted to say thanks for everyones help over the years and your welcome if I have ever answerd any ones postings...We have this altima with a 2.5 [...] and it is puzzling as its showing to me as a fuel pump problem as it will be hard to start ...
August 05, 2010
2004 Dodge Durango SLT 4.7L Misfire, MIL Lamp on VIN: 1D4HB48N84
P0300: Multiple Misfire Detected. customer says she took the car in for an oil change to a chain store and after replacing the oil the truck will not start they got it to start but car was shaking really bad i scanned the car found po300 random miss i took plugs out and bank 1 plugs are all fa...
August 06, 2010
2002 Nissan Maxima SE 3.5L Misfire, smokes VIN: JN1DA31DX2
P0300: Multiple Misfire Detected. ... need help.customer complaint is long crank,whitish gray smoke out exhaust that smells strongly of fuel and runs rough.when i first started the car it was missing and had the smoke that smells super strong of fuel.after a few minutes the miss cleared up and...
August 06, 2010
2006 Chevrolet Silverado 2500 HD WT 6.0L Misfire VIN: 1GBHC24U56
P0300: Multiple Engine Misfire Detected. has a misfire on cly. 1,5,6,8 only at or around 2200 to 3000 rpm. moved coils from non misfire cly. to ones that are not. fuel psi. is 58 psi. i did a injetor balance test all looked good 55psi drop to 39 psi. did not find any vac. leaks hot or cold. did the t...
August 07, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0300: random misfire. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 07, 2010
2004 Pontiac Sunfire SE 2.2L Misfire, MIL Lamp on VIN: 1G2JB12F14
P0300: Multiple Engine Misfire Detected. hey evreyone. Im wondering if any one out there has had any issues like this (maybe someone can save me the time of opening the entire engine harness). I have power on the pink wire at the injector, but no noid light flash. i have continuity on the pink/black ...
August 07, 2010
2003 Kia Sorento EX 3.5L Hesitation, Misfire, MIL Lamp on VIN: KNDJC73313
P0300: Multiple Misfire Detected. Hello IATN members! We are getting ripped here one this KIA! This vehicle was purchased by a local car lot at the auction so we dont have any repair history. The vehicle came in with a slight miss-fire and check engine light on. We replaced the spark plugs, ...
August 09, 2010
2001 Mazda Miata SE 1.8L Surge, Cuts out VIN: JMINB35361
P0300: Random Misfire Detected. I have this very intermitent problem, that only happens when the car is warming up on acceleration. It sets a po300 random missfire code.The customer describes it as a pause in acceleration. Scan data looks normal ie: fuel trim,tps... Has new plugs, anyone hav...
August 09, 2010
1999 Chevrolet Corvette 5.7L long crank time VIN: 1G1YY32G2X
P0300: Multiple Engine Misfire Detected. this car cam in with a running rough problem,and a complaint of a long crank time.checked the fuel presser and noticed it would read 55 pounds but would drop down tow 0 pounds real fast,so i jumped on it and replaced the fuel pump.did not fix the problem.this ...
August 10, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0300: random misfire. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 10, 2010
1998 Pontiac Grand Prix SE 3.8L Misfire VIN: 1G2WJ52K1W
P0300: Multiple Engine Misfire Detected. Car came in with dead miss on cylinder #4. Thuroughly checked ignition system. Swaped coils, no change. Swaped modules with a known good test one, no change. Swapped plug wires, no change. Swapped spark plugs, no change. System capable of producing 30,000 volt...
August 11, 2010
2000 Toyota Tacoma SR5 3.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 4TAWN72N8Y
P0300: Multiple Cylinder Misfire Detected. Here is an interesting one: This vehicle has very low actual mileage. Tested and replaced Cam positon sensor. Cam sensor tested good but replaced it anyway. Problem remains. Tested and replaced crank shaft position sensor as well as a poor signal from this has...
August 11, 2010
2001 Chevrolet S10 4.3L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GCCT19WX1
P0300: Multiple Engine Misfire Detected. This S-10 is beating me up bad! Customer complaint is a shake at highway speeds. After rotating and balancing 4 JUNK BFG All terrains and replacing a smoked wheel bearing I am then told the shaking is intermittent at highway speeds under slight load and accomp...
August 12, 2010
2001 Acura TL 3.2L Hesitation, Cuts out VIN: 1Z324TY5KD
P0300: Random Misfire Detected. Vehicle will start every time however when throttle is depressed engine will nearly or will die. Once above 2500 by feathering throttle, engine runs perfect. Engine performance increases if fuel return is pinched, however fuel regulator and pump have been chan...
August 16, 2010
1997 Oldsmobile LSS 3.8L Misfire VIN: 1G3HY52K0V
P0300: Engine Misfire Detected. ... failure on nox at 15 and 25 mph, and code p0300 random misfire. I checked the EGR valve for nox found it was working fine , the O2 sensor is in fuel control, compression, is at 180 psi all 6 cylinder, We changed the Cat to get the nox down. Now to the misf...
August 16, 2010
2006 Pontiac Pursuit 2.2L Misfire VIN: 1G2AJ55F56
P0300: misfire detected. this car has new ignition module,dealer spark plugs and 2 new coil packs.misfire changes every time we start the car.all grounds were cleaned.Any help is appreciated.thanks jim
August 16, 2010
2001 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Engine smoke VIN: 1GBHG31R31
P0300: Multiple Cylinder Misfire Detected. ... start up in the morning - check engine lamp was on - customer stated engine would smoke a lot -- found a P0300 random misfire code - I started the truck and it ran smooth, but as it warmed up - it ran rougher and rougher - check engine lamp came back on - ...
August 17, 2010
2001 Chevrolet Blazer LS 4.3L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GNDT13W51
P0300: Multiple Cylinder Misfire Detected. This truck is driving me crazy! It has a misfire on Cyl.'s 1 & 2. I have checked compression, Fuel Pressure, & Injector Pulse Waveform. The only thing I can find is cam retard is -9 and of course it won't do a crank re-learn. Yesterday I took off the i...
August 17, 2010
1999 Dodge Intrepid 2.7L Poor Idle Quality, Misfire VIN: 2B3HD46R3X
P0300: Multiple Cylinder Misfire Detected. ... pressure was in normal range but dropped quickly with engine off found 3 injectors lweaking also found lower intake manifold vac leak replace gasket codes p0300 p0301 p0303 no miss fire showing o...
August 17, 2010
2001 Acura TL 3.2L Hesitation, Cuts out VIN: 1Z324TY5KD
P0300: Random Misfire Detected. Vehicle will start every time however when throttle is depressed engine will nearly or will die. Once above 2500 by feathering throttle, engine runs perfect. Engine performance increases if fuel return is pinched, however fuel regulator and pump have been chan...
August 18, 2010
2001 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Engine smoke VIN: 1GBHG31R31
P0300: Multiple Cylinder Misfire Detected. ... start up in the morning - check engine lamp was on - customer stated engine would smoke a lot -- found a P0300 random misfire code - I started the truck and it ran smooth, but as it warmed up - it ran rougher and rougher - check engine lamp came back on - ...
August 18, 2010
2000 Toyota 4Runner Limited 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JT3GN87R0Y
P0300: Multiple Cylinder Misfire Detected. Truck came in w/p0300 p0303 p0304. Truck had 2 different types of spark plugs. Changed spark plugs & wires. Cleared codes & drove the truck. When cold, truck run perfect. After it warmed up p0304 came back. It seems to run better at high rpm. #4 inject...
August 18, 2010
2002 Land Rover Freelander SE 2.5L Misfire, MIL Lamp on VIN: SALNM22272
P0300: Random misfire detected. ... MIL with a P0171. Diagnosis of this code found a vacuum leak between the intake plenum and the lower intake. Recommended to customer resealing and while the plenum was off to replace it as these are notorious for the plenum going bad and needing to be repl...
August 19, 2010
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G4W
P0300: Multiple Cylinder Misfire Detected. Vehicle running poorly, missfiring on the rear 3 cylinders. Have scope tested ignition and verified spark via KV tester and all is good on all 6 cylinders. Tested compression of rear cylinders all around 120 psi. Tested for vacuum leaks and unable to find any....
August 19, 2010
2000 Volkswagen Jetta GL 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: VWVW4FYLMO
P0300: random miss fire. This car will not take the gas at all. When it is cold it will only sit and ideal , if you hit the gas it falls flat on its face. Plugs were real bad looking. They looked like they have been buring oil. The coil pack was replaced along with plugs , wires. the ...
August 23, 2010
2006 Chevrolet Express 3500 6.0L Misfire VIN: 1GBJG31U66
P0300: Multiple Cylinder Misfire Detected. Intermittent misfires mostly on 1 and 8 cylinders. will run like a top and then some cylinders will misfire about 20 times then be good again. Has coil over plug. I'm kinda stumped because it won't misfire long enough, but when it does it's a dead miss.
August 24, 2010
1996 Saturn SL2 1.9L No Start, Stall, Misfire VIN: 1G8ZJ5270T
P0300: Random Misfire Detected. Car was towed in with starts/dies symptom. Cold start and the scope patterns for the #4 Compression Siganl is normal along with the CKP sensor and the Coil signals. When the symptoms start occuring the scope pattern of the #4 Compression Signal stays high most...
August 24, 2010
2000 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1Y
P0300: Multiple Cylinder Misfire Detected. This van came to us with a rough idle and MIL on. Misfire counters showed cyls. 3 & 5 (Bank 1)at idle. Misfires stop at 1500 rpm. Misfire counters go to zero.(See repair and test history). Misfire still present after CSFI Unit and other repairs. Valve spri...
August 25, 2010
2004 Volkswagen Touareg V6 3.2L Cuts out, Misfire, MIL Lamp on VIN: WVGBC67L74
P0300: random misfire. thanks in advance, this car is new customer, has a severe engine miss at about 2100 rpm,replaced spark plugs,fuel preasure is good, I read about the pcm reflash the nearest dealer is a long way from here, was wondering if this reflash should be first step or m...
August 25, 2010
2004 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N74
P0300: Multiple Cylinder Misfire Detected. ... light on check codes code p0300 and p0420. Check misfire data #2 cylinder had multiple misfires counts 829. some on other cylinders too but number 2 the worst. Check plugs and wires they had been changed. Check fuel pressure ok 55psi. Let vehicle set overn...
August 26, 2010
2000 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1Y
P0300: Multiple Cylinder Misfire Detected. This van came to us with a rough idle and MIL on. Misfire counters showed cyls. 3 & 5 (Bank 1)at idle. Misfires stop at 1500 rpm. Misfire counters go to zero.(See repair and test history). Misfire still present after CSFI Unit and other repairs. Valve spri...
August 26, 2010
2005 Ford Ranger XL 3.0L Misfire, MIL Lamp on VIN: 1FTYR44U95
Have this ranger that flags a miss on # 6 cylinder cold. Check tsb for valve problem but exhaust valve has no resetion in head. Checked intake for vaccum leak none found. Checked injector. This vehicle seems to run ok but keeps flagging code. Any ideas
August 27, 2010
2004 Kia Rio 1.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNADC12544
P0300: Random Cylinder Misfire Detected. We got this rio from another shop that has replaced complete secondary and still having problems. we originally had some trouble getting it to act up. Vehicle will sit over night we let it run for 30 min and will get codes and engine runs terrible. the previou...
August 27, 2010
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GNCS13W91
P0300: Multiple Engine Misfire Detected. ... with code p0304, clear code and goes to p0300. Computer scan data shows hard misfire cylinder #4. Vehicle exhibits no symptoms and is hitting on all cylinders. MIL is flashing. Code is false, no misfire is occuring. What can cause computer to think #4 is...
August 30, 2010
2006 Chevrolet Express 2500 4.8L MIL Lamp on VIN: 1GCGG25V46
P0300: Multiple Cylinder Misfire Detected. can misfire cause low manifold vacuum and a bad tps reading if vehicle is die's?/stalls. i have flashed latest calibration. clean injectors and have no misfires on misfire graphic. fuel trims are good..thanks for any help in advance
August 30, 2010
2004 BMW 545i 4.4L Misfire VIN: WBANBANB33
this is one that we dont see a lot of,got thrown under a bus so i got try to fix it.this is what i got going on,this car runs great at times and then it starts to surg up and down,i noticed that the oil top is leaking real bad and when i remove it with the eng...
August 31, 2010
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GNCS13W91
P0300: Multiple Engine Misfire Detected. ... with code p0304, clear code and goes to p0300. Computer scan data shows hard misfire cylinder #4. Vehicle exhibits no symptoms and is hitting on all cylinders. MIL is flashing. Code is false, no misfire is occuring. What can cause computer to think #4 is...
August 31, 2010
2002 Ford Taurus SE 2-Valve 3.0L Hesitation, Misfire, MIL Lamp on VIN: 1FAFP53U72
P0300: random/multiple misfire. ... 95% of the time, but going up a long hill only at highway speeds or an inclined on-ramp to the freeway it loses power/hesitates and flashes the MIL. I get p0300 - random/multiple misfire and individual cyl. misfire codes, no rhyme or reason. I have replace...
August 31, 2010
2005 Ford F-350 Super Duty XL 5.4L Hesitation, Misfire, MIL Lamp on VIN: 1FTWW31545
P0300: Random Misfire Detected. This truck intermittently falls on its face while accelerating, its happening more and more. Both 02 sensors stay at around .95V and short term fuel trim is -20%. Map sensor voltage is at 4.99V. Its like this thing cannot get enough air. I did find a TSB #07M0...
August 31, 2010
1999 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA466XX
P0300: Random Misfire Detected. I'm not real familiar with Mitsu's. My scan tool provides very little inside as well. No oil on the plugs when I replaced them. So, not fouling. I realize that the injectors could be at fault, but, I'm not getting any indication of that from the scan tool. It'...
August 31, 2010
2001 Mitsubishi Montero Limited 3.5L Misfire, MIL Lamp on VIN: JA4MW51R41
P0300: Random Misfire Detected. I am trying to figure out why my fuel trims are high on one bank. Bank 2 = 12.5 LTFT bank 1 = 6 LTFT, I did reset fuel trims to 0 and they end up back as noted above. I have tried everything I can think of to rule out that it is not related to the plenumn remo...
August 31, 2010
2005 Porsche Cayenne 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WP1AA29P15
P0300: random/multiple cylinder misfire detected. ... months, can hear it popping trough intake. Pulled codes p0300 and p0304. I switched coils 3 and 4 and the problem still stayed on 4. I did a compression test 1-200,2-195,3-200,4-95,5-195,6-160. I sprayed some oil into # 4 spark plug hole and comp. went up ...
August 02, 2010
2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R7Y
P0300: Multiple Cylinder Misfire Detected. this car has the codes listed and you can not feel a misfire i do know that the maf and the coil pack were replaced along with the sparkplugs(found repair invoice in seat) scanner shows history misfires but no current we cleared light and drove several times o...
August 04, 2010
2004 Chrysler PT Cruiser 2.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on, MIL flash VIN: 3C4FY48B34
P0300: Multiple Cylinder Misfire Detected. Customer had vehicle towed in at the end of May this year at 64,494 miles stating mil illumninated at freeway speeds -vehicle started shaking like clutch was not disengaged. Vehicle did not stall but had no power to accelerate. Found related TSB indicating cam...
August 04, 2010
2006 Chevrolet Silverado 1500 LS 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 3GCEC14X16
P0300: Multiple Cylinder Misfire Detected. we have been all over this thing it is missing on 2,4,6 injector pulse is good on ye/bk(cylinder 6),l-bl/bk(4 cylinder),l-gn(2 cylinder). We dropped the exaust and there was no change ignition spark looks good. Fuel trims sht term is 2-6. All fuses have been c...
August 05, 2010
2002 Dodge Intrepid SE 2.7L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2C3HH46R32
P0300: Multiple Cylinder Misfire Detected. Fellow IATNers: My brother has a 2002 Intrepid 2.7 with a problem in the morning when they first start away. It starts and runs smoothly but when they start down the street it will not go over 40 kmph [25mph]. Sometimes it misses terribly and sometimes makes a...
August 05, 2010
2002 Nissan Maxima SE 3.5L Misfire, smokes VIN: JN1DA31DX2
P0300: Multiple Misfire Detected. ... need help.customer complaint is long crank,whitish gray smoke out exhaust that smells strongly of fuel and runs rough.when i first started the car it was missing and had the smoke that smells super strong of fuel.after a few minutes the miss cleared up and...
August 05, 2010
2003 Nissan Altima S 2.5L Misfire, MIL Lamp on VIN: 1N4AL11D75
P0300: Multiple Misfire Detected. Hi to all...Just wanted to say thanks for everyones help over the years and your welcome if I have ever answerd any ones postings...We have this altima with a 2.5 [...] and it is puzzling as its showing to me as a fuel pump problem as it will be hard to start ...
August 05, 2010
2004 Dodge Durango SLT 4.7L Misfire, MIL Lamp on VIN: 1D4HB48N84
P0300: Multiple Misfire Detected. customer says she took the car in for an oil change to a chain store and after replacing the oil the truck will not start they got it to start but car was shaking really bad i scanned the car found po300 random miss i took plugs out and bank 1 plugs are all fa...
August 06, 2010
2002 Nissan Maxima SE 3.5L Misfire, smokes VIN: JN1DA31DX2
P0300: Multiple Misfire Detected. ... need help.customer complaint is long crank,whitish gray smoke out exhaust that smells strongly of fuel and runs rough.when i first started the car it was missing and had the smoke that smells super strong of fuel.after a few minutes the miss cleared up and...
August 06, 2010
2006 Chevrolet Silverado 2500 HD WT 6.0L Misfire VIN: 1GBHC24U56
P0300: Multiple Engine Misfire Detected. has a misfire on cly. 1,5,6,8 only at or around 2200 to 3000 rpm. moved coils from non misfire cly. to ones that are not. fuel psi. is 58 psi. i did a injetor balance test all looked good 55psi drop to 39 psi. did not find any vac. leaks hot or cold. did the t...
August 07, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0300: random misfire. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 07, 2010
2004 Pontiac Sunfire SE 2.2L Misfire, MIL Lamp on VIN: 1G2JB12F14
P0300: Multiple Engine Misfire Detected. hey evreyone. Im wondering if any one out there has had any issues like this (maybe someone can save me the time of opening the entire engine harness). I have power on the pink wire at the injector, but no noid light flash. i have continuity on the pink/black ...
August 07, 2010
2003 Kia Sorento EX 3.5L Hesitation, Misfire, MIL Lamp on VIN: KNDJC73313
P0300: Multiple Misfire Detected. Hello IATN members! We are getting ripped here one this KIA! This vehicle was purchased by a local car lot at the auction so we dont have any repair history. The vehicle came in with a slight miss-fire and check engine light on. We replaced the spark plugs, ...
August 09, 2010
2001 Mazda Miata SE 1.8L Surge, Cuts out VIN: JMINB35361
P0300: Random Misfire Detected. I have this very intermitent problem, that only happens when the car is warming up on acceleration. It sets a po300 random missfire code.The customer describes it as a pause in acceleration. Scan data looks normal ie: fuel trim,tps... Has new plugs, anyone hav...
August 09, 2010
1999 Chevrolet Corvette 5.7L long crank time VIN: 1G1YY32G2X
P0300: Multiple Engine Misfire Detected. this car cam in with a running rough problem,and a complaint of a long crank time.checked the fuel presser and noticed it would read 55 pounds but would drop down tow 0 pounds real fast,so i jumped on it and replaced the fuel pump.did not fix the problem.this ...
August 10, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0300: random misfire. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 10, 2010
1998 Pontiac Grand Prix SE 3.8L Misfire VIN: 1G2WJ52K1W
P0300: Multiple Engine Misfire Detected. Car came in with dead miss on cylinder #4. Thuroughly checked ignition system. Swaped coils, no change. Swaped modules with a known good test one, no change. Swapped plug wires, no change. Swapped spark plugs, no change. System capable of producing 30,000 volt...
August 11, 2010
2000 Toyota Tacoma SR5 3.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 4TAWN72N8Y
P0300: Multiple Cylinder Misfire Detected. Here is an interesting one: This vehicle has very low actual mileage. Tested and replaced Cam positon sensor. Cam sensor tested good but replaced it anyway. Problem remains. Tested and replaced crank shaft position sensor as well as a poor signal from this has...
August 11, 2010
2001 Chevrolet S10 4.3L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GCCT19WX1
P0300: Multiple Engine Misfire Detected. This S-10 is beating me up bad! Customer complaint is a shake at highway speeds. After rotating and balancing 4 JUNK BFG All terrains and replacing a smoked wheel bearing I am then told the shaking is intermittent at highway speeds under slight load and accomp...
August 12, 2010
2001 Acura TL 3.2L Hesitation, Cuts out VIN: 1Z324TY5KD
P0300: Random Misfire Detected. Vehicle will start every time however when throttle is depressed engine will nearly or will die. Once above 2500 by feathering throttle, engine runs perfect. Engine performance increases if fuel return is pinched, however fuel regulator and pump have been chan...
August 16, 2010
1997 Oldsmobile LSS 3.8L Misfire VIN: 1G3HY52K0V
P0300: Engine Misfire Detected. ... failure on nox at 15 and 25 mph, and code p0300 random misfire. I checked the EGR valve for nox found it was working fine , the O2 sensor is in fuel control, compression, is at 180 psi all 6 cylinder, We changed the Cat to get the nox down. Now to the misf...
August 16, 2010
2006 Pontiac Pursuit 2.2L Misfire VIN: 1G2AJ55F56
P0300: misfire detected. this car has new ignition module,dealer spark plugs and 2 new coil packs.misfire changes every time we start the car.all grounds were cleaned.Any help is appreciated.thanks jim
August 16, 2010
2001 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Engine smoke VIN: 1GBHG31R31
P0300: Multiple Cylinder Misfire Detected. ... start up in the morning - check engine lamp was on - customer stated engine would smoke a lot -- found a P0300 random misfire code - I started the truck and it ran smooth, but as it warmed up - it ran rougher and rougher - check engine lamp came back on - ...
August 17, 2010
2001 Chevrolet Blazer LS 4.3L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GNDT13W51
P0300: Multiple Cylinder Misfire Detected. This truck is driving me crazy! It has a misfire on Cyl.'s 1 & 2. I have checked compression, Fuel Pressure, & Injector Pulse Waveform. The only thing I can find is cam retard is -9 and of course it won't do a crank re-learn. Yesterday I took off the i...
August 17, 2010
1999 Dodge Intrepid 2.7L Poor Idle Quality, Misfire VIN: 2B3HD46R3X
P0300: Multiple Cylinder Misfire Detected. ... pressure was in normal range but dropped quickly with engine off found 3 injectors lweaking also found lower intake manifold vac leak replace gasket codes p0300 p0301 p0303 no miss fire showing o...
August 17, 2010
2001 Acura TL 3.2L Hesitation, Cuts out VIN: 1Z324TY5KD
P0300: Random Misfire Detected. Vehicle will start every time however when throttle is depressed engine will nearly or will die. Once above 2500 by feathering throttle, engine runs perfect. Engine performance increases if fuel return is pinched, however fuel regulator and pump have been chan...
August 18, 2010
2001 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Engine smoke VIN: 1GBHG31R31
P0300: Multiple Cylinder Misfire Detected. ... start up in the morning - check engine lamp was on - customer stated engine would smoke a lot -- found a P0300 random misfire code - I started the truck and it ran smooth, but as it warmed up - it ran rougher and rougher - check engine lamp came back on - ...
August 18, 2010
2000 Toyota 4Runner Limited 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JT3GN87R0Y
P0300: Multiple Cylinder Misfire Detected. Truck came in w/p0300 p0303 p0304. Truck had 2 different types of spark plugs. Changed spark plugs & wires. Cleared codes & drove the truck. When cold, truck run perfect. After it warmed up p0304 came back. It seems to run better at high rpm. #4 inject...
August 18, 2010
2002 Land Rover Freelander SE 2.5L Misfire, MIL Lamp on VIN: SALNM22272
P0300: Random misfire detected. ... MIL with a P0171. Diagnosis of this code found a vacuum leak between the intake plenum and the lower intake. Recommended to customer resealing and while the plenum was off to replace it as these are notorious for the plenum going bad and needing to be repl...
August 19, 2010
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G4W
P0300: Multiple Cylinder Misfire Detected. Vehicle running poorly, missfiring on the rear 3 cylinders. Have scope tested ignition and verified spark via KV tester and all is good on all 6 cylinders. Tested compression of rear cylinders all around 120 psi. Tested for vacuum leaks and unable to find any....
August 19, 2010
2000 Volkswagen Jetta GL 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: VWVW4FYLMO
P0300: random miss fire. This car will not take the gas at all. When it is cold it will only sit and ideal , if you hit the gas it falls flat on its face. Plugs were real bad looking. They looked like they have been buring oil. The coil pack was replaced along with plugs , wires. the ...
August 23, 2010
2006 Chevrolet Express 3500 6.0L Misfire VIN: 1GBJG31U66
P0300: Multiple Cylinder Misfire Detected. Intermittent misfires mostly on 1 and 8 cylinders. will run like a top and then some cylinders will misfire about 20 times then be good again. Has coil over plug. I'm kinda stumped because it won't misfire long enough, but when it does it's a dead miss.
August 24, 2010
1996 Saturn SL2 1.9L No Start, Stall, Misfire VIN: 1G8ZJ5270T
P0300: Random Misfire Detected. Car was towed in with starts/dies symptom. Cold start and the scope patterns for the #4 Compression Siganl is normal along with the CKP sensor and the Coil signals. When the symptoms start occuring the scope pattern of the #4 Compression Signal stays high most...
August 24, 2010
2000 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1Y
P0300: Multiple Cylinder Misfire Detected. This van came to us with a rough idle and MIL on. Misfire counters showed cyls. 3 & 5 (Bank 1)at idle. Misfires stop at 1500 rpm. Misfire counters go to zero.(See repair and test history). Misfire still present after CSFI Unit and other repairs. Valve spri...
August 25, 2010
2004 Volkswagen Touareg V6 3.2L Cuts out, Misfire, MIL Lamp on VIN: WVGBC67L74
P0300: random misfire. thanks in advance, this car is new customer, has a severe engine miss at about 2100 rpm,replaced spark plugs,fuel preasure is good, I read about the pcm reflash the nearest dealer is a long way from here, was wondering if this reflash should be first step or m...
August 25, 2010
2004 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N74
P0300: Multiple Cylinder Misfire Detected. ... light on check codes code p0300 and p0420. Check misfire data #2 cylinder had multiple misfires counts 829. some on other cylinders too but number 2 the worst. Check plugs and wires they had been changed. Check fuel pressure ok 55psi. Let vehicle set overn...
August 26, 2010
2000 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1Y
P0300: Multiple Cylinder Misfire Detected. This van came to us with a rough idle and MIL on. Misfire counters showed cyls. 3 & 5 (Bank 1)at idle. Misfires stop at 1500 rpm. Misfire counters go to zero.(See repair and test history). Misfire still present after CSFI Unit and other repairs. Valve spri...
August 26, 2010
2005 Ford Ranger XL 3.0L Misfire, MIL Lamp on VIN: 1FTYR44U95
Have this ranger that flags a miss on # 6 cylinder cold. Check tsb for valve problem but exhaust valve has no resetion in head. Checked intake for vaccum leak none found. Checked injector. This vehicle seems to run ok but keeps flagging code. Any ideas
August 27, 2010
2004 Kia Rio 1.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNADC12544
P0300: Random Cylinder Misfire Detected. We got this rio from another shop that has replaced complete secondary and still having problems. we originally had some trouble getting it to act up. Vehicle will sit over night we let it run for 30 min and will get codes and engine runs terrible. the previou...
August 27, 2010
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GNCS13W91
P0300: Multiple Engine Misfire Detected. ... with code p0304, clear code and goes to p0300. Computer scan data shows hard misfire cylinder #4. Vehicle exhibits no symptoms and is hitting on all cylinders. MIL is flashing. Code is false, no misfire is occuring. What can cause computer to think #4 is...
August 30, 2010
2006 Chevrolet Express 2500 4.8L MIL Lamp on VIN: 1GCGG25V46
P0300: Multiple Cylinder Misfire Detected. can misfire cause low manifold vacuum and a bad tps reading if vehicle is die's?/stalls. i have flashed latest calibration. clean injectors and have no misfires on misfire graphic. fuel trims are good..thanks for any help in advance
August 30, 2010
2004 BMW 545i 4.4L Misfire VIN: WBANBANB33
this is one that we dont see a lot of,got thrown under a bus so i got try to fix it.this is what i got going on,this car runs great at times and then it starts to surg up and down,i noticed that the oil top is leaking real bad and when i remove it with the eng...
August 31, 2010
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GNCS13W91
P0300: Multiple Engine Misfire Detected. ... with code p0304, clear code and goes to p0300. Computer scan data shows hard misfire cylinder #4. Vehicle exhibits no symptoms and is hitting on all cylinders. MIL is flashing. Code is false, no misfire is occuring. What can cause computer to think #4 is...
August 31, 2010
2002 Ford Taurus SE 2-Valve 3.0L Hesitation, Misfire, MIL Lamp on VIN: 1FAFP53U72
P0300: random/multiple misfire. ... 95% of the time, but going up a long hill only at highway speeds or an inclined on-ramp to the freeway it loses power/hesitates and flashes the MIL. I get p0300 - random/multiple misfire and individual cyl. misfire codes, no rhyme or reason. I have replace...
August 31, 2010
2005 Ford F-350 Super Duty XL 5.4L Hesitation, Misfire, MIL Lamp on VIN: 1FTWW31545
P0300: Random Misfire Detected. This truck intermittently falls on its face while accelerating, its happening more and more. Both 02 sensors stay at around .95V and short term fuel trim is -20%. Map sensor voltage is at 4.99V. Its like this thing cannot get enough air. I did find a TSB #07M0...
August 31, 2010
1999 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA466XX
P0300: Random Misfire Detected. I'm not real familiar with Mitsu's. My scan tool provides very little inside as well. No oil on the plugs when I replaced them. So, not fouling. I realize that the injectors could be at fault, but, I'm not getting any indication of that from the scan tool. It'...
August 31, 2010
2001 Mitsubishi Montero Limited 3.5L Misfire, MIL Lamp on VIN: JA4MW51R41
P0300: Random Misfire Detected. I am trying to figure out why my fuel trims are high on one bank. Bank 2 = 12.5 LTFT bank 1 = 6 LTFT, I did reset fuel trims to 0 and they end up back as noted above. I have tried everything I can think of to rule out that it is not related to the plenumn remo...
August 31, 2010