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P0300 Diagnostic Trouble Code Discussion for March 2005

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1997 BMW 540i 4.4L Stall, MIL Lamp on VIN: WBADE6328V
P0300: multiple misfire. ... handle on this BMW. The customer says it begins idling poorly and stalling when the fuel gauge falls below 1/4 tank. Alldata has no repair track for the P1585 code, and I'm assuming the others are related. There is no appar...
March 01, 2005
1996 GMC C2500 Sierra SL 5.7L Misfire, won't shift VIN: 1GTFC24R6T
P0300: Multiple Cylinder Misfire Detected. I'm posting this for a friend who has maintained this truck since it was new. It developed a slight miss which has gradually gotten worse to the point that it's undriveable now. The truck will idle fine and everything looks good on the scope (modis) both prima...
March 01, 2005
1999 Mercedes-Benz ML320 3.2L Misfire, fuel level light VIN: 4JGAB54E1X
P0300: random misfire. At half tank fuel level light starts flashing for low fuel level, reoccurring problem. have replaced fuel level sender/fuel pump assembly, twice, repairs it for a short time. 1st time repaired approx 1 year, 2nd time, 2 weeks.
March 01, 2005
1996 Oldsmobile Cutlass Ciera 3.1L Misfire
P0300: Multiple Engine Misfire Detected. ... home after work and the vehicle is at work. I first began working on this gem in december. The usual intake job that we are all familiar with. At the time the service engine light was on with P0300 and misfires on #5 and ...
March 01, 2005
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD52Y8T
P0300: Engine Misfire Detected. cust states that after over night sits 8-10 hrs or at least a 2 hr sit between engine starts, engine runs rough for at least 5 to 10 seconds. engine smooths out after 10 seconds. mil light then is on. engine was started and run for approx 5 seconds then shut o...
March 02, 2005
2001 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2NF52751
P0300: Multiple Cylinder Misfire Detected. trying to help out a local used car dealer on this one.he can't sell the car unless he gets this solved!shortly after he aquired the car,the mil came on.he tried to repair it himself by replacing plugs,and complete coil housing assembly from another car.code c...
March 02, 2005
2002 Chevrolet Tahoe LS 5.3L Misfire, MIL Lamp on VIN: 1GNEK13ZO2
P0300: Multiple Cylinder Misfire Detected. Hi erveryone and thanks for the soon coming help. I just got put on this tahoe to try to repair a misfire problem on cyl #'s 4 and 5. #5 misfires increased quickly when first started even after previous mechanic installed new plugs and wires.#4 came up also bu...
March 08, 2005
1998 GMC Sonoma SLE 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTCS194XW
P0300: Multiple Engine Misfire Detected. Here's one that is making our lives interesting. The vehicle runs like the converter or exhaust is restricted or plugged. It will start and maintain a rough idle, engine vacuum at the intake manifold is 12 inches or less, when the throttle is opened the engine...
March 08, 2005
2000 Pontiac Montana 3.4L No Start VIN: 1GMDX03EXY
P0300: Multiple Cylinder Misfire Detected. Hello Gentlemen! Thank you SO much in advance for your help! This is what I have: NO START, good spark, good fuel pressure, but injectors will not fire. Good power to injectors (see above), injector resistance seems reasonable (#1-11.7 ohms,#2-11.6, #3-11.6, #...
March 08, 2005
1999 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22GSX
P0300: Multiple Engine Misfire Detected. Has random misfire code P0300. Misfire counts seem to be mainly with #3, #5, and #7 cylinders. Has had misfires on other cylinders in history but mainly those 3. Fuel pressure is good, injector pulse is good, smoked intake for vacuum leaks and none found. Can ...
March 09, 2005
1998 GMC Sonoma SLE 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTCS194XW
P0300: Multiple Engine Misfire Detected. Here's one that is making our lives interesting. The vehicle runs like the converter or exhaust is restricted or plugged. It will start and maintain a rough idle, engine vacuum at the intake manifold is 12 inches or less, when the throttle is opened the engine...
March 09, 2005
1996 Jeep Grand Cherokee Laredo 4.0L Cuts out, Misfire VIN: 1J4FX5857T
P0300: Multiple Cylinder Misfire Detected. Jeep arrived in shop for a cold start complaint. It ran fair when warmed up but had to be ambiant temp to reproduce problem. The SES light yielded a cam or crank intermittent failure that led me to a underhood exam only to find that this had been someone elses...
March 10, 2005
1997 Chevrolet Blazer 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GNDT13W0V
P0300: Multiple Cylinder Misfire Detected. Customer brought vehicle to us with a complaint of no power. Vehicle boggs down under load. checked for codes and found po100, po300, and po420. checked MAF sensor operation and found B+, referance and activity to be ok. checked fuel pressure and found that to...
March 11, 2005
2000 Pontiac Montana 3.4L No Start VIN: 1GMDX03EXY
P0300: Multiple Cylinder Misfire Detected. Hello Gentlemen! Thank you SO much in advance for your help! This is what I have: NO START, good spark, good fuel pressure, but injectors will not fire. Good power to injectors (see above), injector resistance seems reasonable (#1-11.7 ohms,#2-11.6, #3-11.6, #...
March 11, 2005
2002 Daewoo Lanos S 1.6L MIL Lamp on
P0300: random/mult. cyl. misfire. ... could check why MIL on. I found code P0300. No misfire detected. car runs smooth. good fuel press. no restrictions. I found no vaccum or airleaks at intake manifold or vac. lines. I did find a chaffed wire at the coil. found it to be a gnd wire & fixed...
March 13, 2005
2000 Audi TT 1.8L No Start, Stall VIN: TRUUC28N6Y
P0300: random missfire. Audi techs please help! I have a TT in my bay that will fuel foul spark plugs and eventually not start at all. If I replace the plugs the car will run ok for a couple of weeks but gradually become to be difficult to start cold.This is a car that we have on our...
March 14, 2005
2003 Chevrolet Express 2500 5.3L Poor Idle Quality, Misfire VIN: 1GCFG25TX3
P0300: Multiple Cylinder Misfire Detected. Truck came in with multiple misfires, mostly 1,8. Also MIL worked sometimes. Found TSB for wiring problem near l/f upper control arm. Repaired 4 wires that the convelute tubing wore through the ecm wiring, that got inj 1, inj 8 and the MIL working properly. No...
March 14, 2005
1995 Chevrolet Blazer 4.3L Poor Idle Quality, Surge, Stall VIN: 1GNDT13W5S
the truck initially came in for a "crank but won't start concern". the truck was cranking slow, we recharged the battery. cranks fine but found ignition wires flashing over and the spark plugs were very worn with carbon built up on them. performed a co...
March 15, 2005
1997 Chevrolet C1500 Cheyenne 5.7L Misfire, MIL Lamp on VIN: 1GCEC19R3V
P0300: Multiple Cylinder Misfire Detected. Thank you for advise in advance, I have had nothing but agrivation from this truck. The truck runs and drives good when it is warmed up. couple days after it is back in owners possesion it will start with a flashing check engine light and bad miss. code will c...
March 15, 2005
1999 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22GSX
P0300: Multiple Engine Misfire Detected. Has random misfire code P0300. Misfire counts seem to be mainly with #3, #5, and #7 cylinders. Has had misfires on other cylinders in history but mainly those 3. Fuel pressure is good, injector pulse is good, smoked intake for vacuum leaks and none found. Can ...
March 15, 2005
2000 Volkswagen Jetta GLS 2.8L Misfire VIN: 3VWSE29M9Y
P0300: random misfire detected. cylinder 4 has a dead miss at idle,cruise,and on accel . hot or cold. ignition patterns are ok , swapped plugs no change,swappped plug wires no change, did injector pressure drop test ,found #4 ingector was 15 psi lower then other ingectors . replaced #4 injec...
March 15, 2005
2001 BMW X5 3.0i 3.0L Misfire VIN: WABFA535XI
P0300: Random misfire. Help. This truck is breaking my stones. At 70k I did a motor saving oil service and replaced spark plugs (plugs PM only) Truck is a neglected piece, but did run good. Customer stated it was misfiring at times after service. I got cyl Misfire codes w/fuel cut o...
March 16, 2005
1996 Chevrolet C1500 5.7L Misfire
P0300: Multiple Cylinder Misfire Detected. First how are all you guys doing. I hope you are doing better than me and this truck that I am have a heck of a time with. First this truck was a 4.3 and the customer had somebody else drop 5.7 in it. customer states truck ran fine for a few days and then sudd...
March 16, 2005
1999 Lincoln Navigator 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5LMPU28A5X
P0300: random misfire. Now it is misfiring on #1 and #2.No water is present.I have replaced the plugs and the coils on these two cylinders with no effect.What am I overlooking? Thanks in advance. Randy
March 16, 2005
2001 BMW X5 3.0i 3.0L Misfire VIN: WABFA535XI
P0300: Random misfire. Help. This truck is breaking my stones. At 70k I did a motor saving oil service and replaced spark plugs (plugs PM only) Truck is a neglected piece, but did run good. Customer stated it was misfiring at times after service. I got cyl Misfire codes w/fuel cut o...
March 17, 2005
2002 Chevrolet Suburban 1500 LS 5.3L Misfire VIN: 1GNFK16T52
P0300: Multiple Cylinder Misfire Detected. Car came in with a missfire. It had never had a tune-up, so we replaced plugs, wires, and all filters. It still continued to miss. Checked missfire data, showed cylinders #2 & 4 missing. Tested injectors, they all work. Checked compression, all had 130 psi...
March 17, 2005
2002 Chevrolet Suburban 1500 LS 5.3L Misfire VIN: 1GNFK16T52
P0300: Multiple Cylinder Misfire Detected. Car came in with a missfire. It had never had a tune-up, so we replaced plugs, wires, and all filters. It still continued to miss. Checked missfire data, showed cylinders #2 & 4 missing. Tested injectors, they all work. Checked compression, all had 130 psi...
March 18, 2005
2000 Honda Accord EX 3.0L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: 1HGCG1658Y
P0300: Multiple Misfire Detected. hi all Honda Tech: I am posting this for another shop. Car had been to three different Dealer. and two other shop. can't seem to fix the problem. dealer and other shop replace a lot of parts. but problem remain. cold start is perfect never had a problem. it al...
March 22, 2005
1995 Mercedes-Benz C280 2.8L Misfire VIN: WDBHA28E6S
P0300: random multiple misfire. ... could happen at any time. may take weeks or months between problem. the check engine light never comes on when the problem occurs, bulb is ok. checked for codes & found p0300 & 0301. cleared codes & went for a 1...
March 22, 2005
1997 Chevrolet Blazer 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GNDT13W0V
P0300: Multiple Cylinder Misfire Detected. Customer brought vehicle to us with a complaint of no power. Vehicle boggs down under load. checked for codes and found po100, po300, and po420. checked MAF sensor operation and found B+, referance and activity to be ok. checked fuel pressure and found that to...
March 23, 2005
2000 Chevrolet Blazer LS 4.3L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W4Y
P0300: Multiple Cylinder Misfire Detected. ... fuel eco. When I scan trim after driving a while they appear normal values less than 5% both banks. but when I WOT once or twice the B1 values go to 50.00% and will not come down untill you drive for a while. All plugs/ignition new. I suspect pluged inject...
March 23, 2005
2000 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on, LONG CRANK THENSTART VIN: 1GCEK14V3Y
P0300: Multiple Cylinder Misfire Detected. ok guys her s what we got have a 2000 chevey that startes hard if u leave it sit for a coulpe hours it will crank for ever then it starts right up we have the advantage from snap on just got it up dated to do coil over plug and guess what it didnt help us at a...
March 23, 2005
2000 Toyota Celica GTS 1.8L Misfire, MIL Lamp on VIN: JTDDY38T3Y
P0300: Multiple Cylinder Misfire Detected. Hello guys, This 2000 Toyota celica came in the shop for the #3 cylinder misfired. We looked through the whole vehicle. The MAF wasn't on there all the way(it has a aftermarket intake). So we resecure the MAF and replaced spark plugs. Came back 4 days later w...
March 23, 2005
1998 GMC K1500 Sierra SL 5.7L Misfire, MIL Lamp on VIN: 2GTEK19R8W
P0300: Multiple Cylinder Misfire Detected. Hello Techs: I have this vehicle that was just bought at the auction.It has the MIL light on and misses.The miss is on cylinders 4&5.I have checked for spark on these cylinders and it was ok.Somebody has tried to repair this prior,I thought it was injector...
March 26, 2005
2001 GMC Safari SLE 4.3L Excessive Emissions, Surge, Misfire, MIL Lamp on VIN: 1GKDM19WX1
P0300: Multiple Cylinder Misfire Detected. van came in on hook crank no start.plugs were gas fouled veh .never been tuned replaced plugs with ac delco started cleared out idles perfect when accel.to 2000 prm or more all cyls. start to missfire and runs filthy rich let off go back to idle and runs fine ...
March 30, 2005
1997 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G1ND52M9V
P0300: Multiple Cylinder Misfire Detected. I got this intermittant problem, gosh I hate saying that , nobody likes intermittants. Well, atleast I don't. this car suppose to be missing, cust. states it chugged and light flashed on him. upon driving over here the chugging gone,(go figure) but light still...
March 31, 2005
1999 Lincoln Town Car Cartier 4.6L MIL Lamp on VIN: 1LNHM83WXX
P0300: random misfire. This car came in 2 months ago with po307 and 308 codes with drivebility problems. The customer okayed new plugs and 2 new coils knowing the light may come back on. The car now has a po300. The car is not acting up. The customer says the car was running fine wh...
March 31, 2005