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P0300 Diagnostic Trouble Code Discussion for January 2004

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR54R8Y P0300: Multiple Cylinder Misfire Detected. car has code po171 lean condition scaned oxygen sensor bank1 sensor 1 reading over 1000 and when you rev it up and let off of gas three different cylinders show missfire then smooths out are these bad for intake gasket leaks i have never worked on one of these...	January 03, 2004
	2000 Chevrolet Astro 4.3L Misfire VIN: 1GCDM19W6Y P0300: Multiple Cylinder Misfire Detected. vehicle came to us from another repair shop with new tune-up,mass airflow & tps.parts replaced per multiple codes. we have scaned vehicle & test drove van cold & hot many times.problem disappears sometimes when hot.we have ran fuel injection clean ...	January 04, 2004
	2002 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GCEC14W12 P0300: Multiple Cylinder Misfire Detected. Need some help with this silverado i had this truck come in about a month ago had a misfire code in it.It would barely run pull plugs they were fuel fouled checked cap and rotor witch had a ton of corrosion and moisture replaced both ran fine . two weeks later...	January 05, 2004
	2002 Chevrolet Silverado 1500 4.3L No Start, Stall, Misfire VIN: 1GCEC14W62 P0300: Multiple Cylinder Misfire Detected. Towed in quit driver states that it lost power and started to miss and back fire, it finale died and wouldn't restart. I checked for spark have spark at plug's sounds like it is out of time. I looked at sensors on my scanner and the weird thing is the scanner ...	January 05, 2004
	1999 Lincoln Navigator 5.4L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 5LMRU27A2X P0300: Random misfire. Hey there Lincoln/Ford techs I have this navigator 5.4DOHC that came in on a tow truck due to a stall at stop and would not restart. I got it to start but shook violently and would not accelerate. Some time it will crank just fine but will load up accelerating...	January 05, 2004
	2001 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 1GCEK19T01 P0300: Multiple Cylinder Misfire Detected. vehicle has low power, acts like plugged exhuast. back pressure test OK. random misfire codes, cuts out. most noticable under load.changed crank sensor due to bad pattern, no change. compared sensor pattern to know good, appears to have extra spikes in pattern...	January 08, 2004
	1996 Chrysler Town & Country 3.3L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1C4GP54R5T P0300: Multiple Cylinder Misfire Detected. I am having aproblem with a 96 town and country. The van came in about a month ago with a check engine light on and codes PO300 and PO302 with a skip and popping in intake. At this time we installed new plugs and wires and cleared codes and test drove no probl...	January 08, 2004
	2001 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 1GCEK19T01 P0300: Multiple Cylinder Misfire Detected. vehicle has low power, acts like plugged exhuast. back pressure test OK. random misfire codes, cuts out. most noticable under load.changed crank sensor due to bad pattern, no change. compared sensor pattern to know good, appears to have extra spikes in pattern...	January 09, 2004
	1999 Mercury Villager Estate 3.3L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 4M2XV11T0X P0300: Multiple Misfire Detected. ... cruise. I checked codes, and had a p0300,and p0325. Seemed like a vac. leak, so I smoked it, and went over it with propane, but found nothing. I checked all other basics, but saw nothing. Checking some previous posts on this ...	January 09, 2004
	1997 Mitsubishi 3000GT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1A3AM44H0V P0300: Random Misfire Detected. Hi Guys , This car came back with a po300 and notice that all of the rear plugs do not change the rpm that much when power balance. Checked cam timing ok/ compression ok/ checked for vacumn leak cant find any .Possible heads machined and intake wont set flat??...	January 09, 2004
	1996 Chevrolet Corsica 3.1L Misfire VIN: 1G1LD55M3T P0300: Multiple Engine Misfire Detected. hello i had this 96 corsica com in with a missfire code it had been recently tuned up i checked the injetor resitance it was in specs it seemed to miss on every cylinder but no.6 seemed to have the highest so i talked the customer into having injectors cleaned...	January 10, 2004
	1996 Lexus GS300 3.0L Misfire, MIL Lamp on VIN: JT8BD42S6T P0300: Multiple Cylinder Misfire Detected. please help, customer live very far from here. car has random miss fire code, scan car to find cly# 1 and # 6 miss firing. car has new ignition parts and distributor. check timing mark and it shows good. we move the injector around to see if miss fire follow b...	January 10, 2004
	2001 Mercury Cougar 2.5L Hesitation, Surge, Stall, Misfire VIN: 1ZWFT61L91 P0300: random misfire. greetins all, this car runs great until accel uphills, fuel pressure drops quickly to 12-6psi and returns to normal quickly if you come to a stop. Light or moderate accelleration runs fine /pressures fine, only firm to hard accel-up hills- will pressure drop a...	January 11, 2004
	1999 Dodge Ram 3500 Van 5.9L MIL Lamp on VIN: 2B5WB35Z1X P0300: Multiple Cylinder Misfire Detected. About 2000 miles and 3 weeks later, vehicle came back and customer said the check engine light had come on while driving but went back off. He did not notice any misfire. Retrieved code PO306 this time. Ran some tests and found no problem so customer took vehi...	January 12, 2004
	1998 Chevrolet Malibu 2.4L Poor Idle Quality, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G1ND52T4W P0300: Multiple Cylinder Misfire Detected. Vehicle came in with a burnt up converter and random misfire as well as catalyst defeceincy codes. Vehicle runs very poorly, pops and spits under acceleration and badly misfires. Found broken vacuum hose to MAP sensor and repaired with no changed. All sensors ...	January 13, 2004
	1998 Dodge Intrepid 2.7L No Start, Poor Idle Quality, Cuts out, Misfire VIN: 2C3HH46R6W P0300: Multiple Cylinder Misfire Detected. This is my personal daily driver, so I know the car well. I've had this problem for the past 2 years with it. The car has trouble running when restarted after a 20+ minute hot soak. After about 40 or so minutes, I don't notice it as much, just a slightly rough...	January 13, 2004
	1996 Chevrolet K2500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEC13RJ7 P0300: Multiple Cylinder Misfire Detected. this is my first request for help. truck hasbeen converted to r/h drive.idle irratic hunts up and down on idle . with air con on idle stabilizes, almost to acceptable levals, no info available on this vehicle in australia . borrowed snap on cartridge from impo...	January 14, 2004
	1999 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR1216X P0300: Multiple Engine Misfire Detected. ... maintenance/spark plugs. Technician found spark plug wires also bad, spark plugs worn out. Replaced spark plugs & plug wires. Technician also cleaned throttle body with air intake cleaner. Car was road tested, technician returned with check engine ligh...	January 14, 2004
	1995 Eagle Talon TSi 2.0L Excessive Emissions, Cuts out, Stall VIN: 4E3AL54F6S P0300: Random misfire. Hi gang, This vehicle came in initially as a check engine light had come on a week prior. Another shop had told him he needed a MAF sensor but they weren't sure. This is our month for problem vehicles. The vehicle will idle normally until it warms up a litt...	January 15, 2004
	1997 Isuzu Rodeo LS 3.2L No Start, Poor Idle Quality, Cuts out, Stall P0300: Multiple Cylinder Misfire Detected. hello , guys i had working on this vehicle for a week it came from another shop where they replace spark plugs fuel filter, timing belt ,and ecm to correct driavilitly promblem,rough idle, engine cut-off, hard starting, i start for cheking the timing belt it w...	January 15, 2004
	1997 Buick LeSabre Limited 3.8L Poor Idle Quality, Misfire VIN: 1G4HR52K6V P0300: Engine Misfire Detected. Misfires @ idle. Ran DTC= PO300= Misfire. Replaced plugs, wires, coils & ICM. Still has misfire @ 3,4 & 6. Ran DTC again= PO300. Runs fine @ higher RPM's. What can we eliminate based on results?	January 16, 2004
	1996 Chevrolet C1500 Suburban LS 5.7L Misfire, MIL Lamp on VIN: 1GNEC16R3T P0300: Multiple Cylinder Misfire Detected. Hi everybody, got this 96 suburban with a dead miss at idle. should be an easy diagnosis but am having a difficult time anyway. Missfire monitor shows number 5 cylinder skipping non stop at idle and seems to go away with throttle. Customer originaly declined d...	January 16, 2004
	1996 Dodge Intrepid 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B3HD46F6T P0300: Multiple Cylinder Misfire Detected. Thanks for this opportunity, My customer came in with this car complaining of a rough running condition. Plugs and wires had been replaced recently(in the last year). Upon inspection we found #4 plug submerged in oil from a leak around the v/c gasket. This pr...	January 16, 2004
	1996 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GNDT13W3T P0300: Multiple Cylinder Misfire Detected. This S10 Blazer has a dead miss--at least #3 is dead and I think #5 also. The mechanic next to me has over 12 hours in it. Please look at the test results BELOW. Also, all spark plugs have been replaced with the proper ones (they were loose Champions gapped t...	January 18, 2004
	1996 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GNDT13W3T P0300: Multiple Cylinder Misfire Detected. This S10 Blazer has a dead miss--at least #3 is dead and I think #5 also. The mechanic next to me has over 12 hours in it. Please look at the test results BELOW. Also, all spark plugs have been replaced with the proper ones (they were loose Champions gapped t...	January 19, 2004
	2000 Pontiac Firebird Formula 5.7L Hesitation, Misfire, MIL Lamp on VIN: 2G2FV22G5Y P0300: Multiple Engine Misfire Detected. when car starts warming up, it intermittently misses on cylinders 2,4,6,8 and runs pretty bad. spark is good, injector balance test showed 10 psi drop on all 8 injectors. now, i found the O2 sensor on bank 1 reading ok, but bank 2 is stuck at 1100mv. i unplugg...	January 19, 2004
	2000 Dodge Ram 1500 Laramie 5.9L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 3B7HC13Z11 P0300: multiple missfire. Hi, need some help with this one, Vehicle has returned to shop 13000 miles after heads were done, customer stated that the vehicle intermitenly hesitates when going up hill, the same three codes reapear each time. cap rotor and plugs all look good replaced ple...	January 20, 2004
	1999 Jaguar XJ8 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: SAJHX6044X P0300: multiple misfire. Hello fellow techs, This Jag came in on the hook 3 weeks age.Customer stated that he left car idling after cold start.Engine died and would not start.There were no engine codes.Did the basic engine/fuel checks and the only problem that I found was worn out sp...	January 20, 2004
	2001 Cadillac DeVille 4.6L Misfire P0300: Engine Misfire Detected. Has int miss on #3 cylinder.Swapped plugs,boots,ign system,injectors from bank to bank.Still came back on #3.Happens once every 4 or 5 days.Happens during warm up only.Coolant temp around 70 degrees.Usually 10 minutes into warm up drive in AM. Freeze frame sh...	January 21, 2004
	1999 Dodge Intrepid 2.7L Cuts out, Stall, MIL Lamp on VIN: 2B3HD46R6X P0300: Multiple Cylinder Misfire Detected. The unit was recently purchased by customer and will run sometimes for a day or two perfect. Then mil light comes on and car will stumble and stall. By the time we can get to get the car back to the shop it runs great. We have no records of maintance but have ...	January 21, 2004
	1996 Plymouth Grand Voyager SE 3.3L Hesitation, Misfire, MIL Lamp on VIN: 1P4GP44R4T P0300: Multiple Cylinder Misfire Detected. ... started six months ago after returning halfway back from a 700 mile trip after being at the beach for a week (salt air seems to have adverse affects on these vehicles). Car lost power while cruising at 60 mph uphill with the AC on, did this for a couple o...	January 21, 2004
	1999 BMW 323i 2.5L Misfire, MIL Lamp on VIN: WBAAM3335X P0300: random misfire. hello again ALL. i have here a 323i with a random misfire. when i checked it out i found no obvious failures. i couldnt locate the mis. however it wasnt always present when i was attempting to fix it. i drove it a bunch and got no misfire. i decided to try a t...	January 23, 2004
	1996 Oldsmobile 88 Royale 3.8L Poor Idle Quality, Misfire VIN: 1G3HN52K7T P0300: Engine Misfire Detected. vehicle misses on #1 at idle hot.The missfire monitor will increment as long as vehicle is idling and stops as soon as you raise the rpms.Vehicle drives fine except at idle hot.#1+4 coil,#1+4 plugs,and #1+4 wires replaced with new test parts.#1 and #3 injector...	January 23, 2004
	1997 Mitsubishi 3000GT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1A3AM44H0V P0300: Random Misfire Detected. Hi Guys , This car came back with a po300 and notice that all of the rear plugs do not change the rpm that much when power balance. Checked cam timing ok/ compression ok/ checked for vacumn leak cant find any .Possible heads machined and intake wont set flat??...	January 24, 2004
	1999 Cadillac DeVille d'Elegance 4.6L MIL Lamp on VIN: 1G6KE54Y9X P0300: Engine Misfire Detected. ... about every two months with code P0300. History codes tell me random cylinders are misfiring, different ones each time, and also long term fuel trim was at +30 bank one and +15 bank two when code occurred. Inspected for vacuu...	January 26, 2004
	2002 Cadillac Escalade 5.3L Misfire, MIL Lamp on VIN: 1GYEC63TO2 P0300: Multiple Cylinder Misfire Detected. I'm hoping some of you Cadilliac techs may have seen this one before. Although this is a Chevrolet engine, I have never seen this one before. It has history miss fires on cyls #1, 3, 5, 7. You can watch the live miss fire counters, and occationally you will se...	January 26, 2004
	1996 Jaguar XJR 4.0L Surge, Cuts out, Misfire VIN: SAJP1148TC P0300: Multiple Cyl. Miss fire. Hello jaguar Gurus, I have this XJR (Stumper)in the shop with MIL on and multple DTC. It starts and idles perfect all the time without any problem, but when it comes to acceleration (Driving or at idle) Eng will not rev. over 2800 RPM, it acts like a rev. limi...	January 26, 2004
	1996 GMC K1500 Sierra SL 5.7L No Start, Poor Idle Quality, Misfire VIN: 1GTEK19R0T P0300: Multiple Cylinder Misfire Detected. someone put sugar or something in this gas tank and ruined the injectors,regulator and pump. my problem is the truck has a missfire still and the intake gasket actually made a popping noise and blew right out toward the valve cover above number 1 cyl. could de...	January 27, 2004
	2000 Pontiac Montana 3.4L No Start, Poor Idle Quality, Stall VIN: 1GMDU23E6Y P0300: Multiple Cylinder Misfire Detected. Hi group, This one is weird. Car is very hard to start cold. You must hold the gas pedal partially and control the idle yourself. It won't idle on it's own. Sometimes it is high and other times it's low. Check for TSB's. Found 01-08-45-005A that indicates the...	January 29, 2004
	1999 Mitsubishi Diamante 3.5L Poor Idle Quality, Idles High VIN: 6MMAP47P2X P0300: Random Misfire Detected. customer complains of high idle after engine died once a week ago. i have checked egr op.,fuel pressure,cooling system,charging system,and induction.computer has no codes stored and all readiness monitors set.scan tool data through my master tech appears to be...	January 30, 2004
	2000 Pontiac Montana 3.4L No Start, Poor Idle Quality, Stall VIN: 1GMDU23E6Y P0300: Multiple Cylinder Misfire Detected. Hi group, This one is weird. Car is very hard to start cold. You must hold the gas pedal partially and control the idle yourself. It won't idle on it's own. Sometimes it is high and other times it's low. Check for TSB's. Found 01-08-45-005A that indicates the...	January 30, 2004
	1996 Volkswagen Jetta GL 2.0L No Start VIN: 3VWRA1H8TM P0300: Multiple misfires. Car towed in died on hwy. Started it and ran into shop and it ran fine. Let sit outside over night and no start, no spark. I checked the cam and crank sensors with a lab scope and I have a good sine wave from crank sensor and the cam makes and nice square wave...	January 30, 2004
	2000 Toyota Tundra Limited 4.7L Misfire, MIL Lamp on VIN: TBBT4412YS P0300: Multiple Cylinder Misfire Detected. good day all, this tundra has the mil on po300, 305 and 307. compression is 175 - 180. current ramped and voltage tested ignition coils and injectors w/ 5100...all good. motorvac'd w/ motorvac solution then with 3m. misfire is not as severe but still there. st...	January 31, 2004
	1996 Volkswagen Jetta GL 2.0L No Start VIN: 3VWRA1H8TM P0300: Multiple misfires. Car towed in died on hwy. Started it and ran into shop and it ran fine. Let sit outside over night and no start, no spark. I checked the cam and crank sensors with a lab scope and I have a good sine wave from crank sensor and the cam makes and nice square wave...	January 31, 2004