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P0301 Diagnostic Trouble Code Discussion for May 2007

Cylinder 1 Misfire Detected


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Trouble Ticket Help Requests for DTC P0301
Help Request Posted
2006 Land Rover Range Rover Supercharged 4.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: SALMF13426
This one has been an issue for the past three weeks in my shop.Only on cold start when the vehicle is put in drive it will misfire and fall flat on its face.Once you cycle the ignition the problem will go away or if you let it run for approximately 2 minutes.I...
May 02, 2007
2002 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K92
P0301: cylinder 1 misfire detected. ... help would be greatly appreciated. Vehicle came into our shop from the dealer which was diagnosed as a valve problem. The customers complaint is a rough idle. No misfire can be felt on acceleration or when cruising. Found a history code p0300 stored. Check...
May 03, 2007
1999 Cadillac Catera 3.0L Surge VIN: W06VR52R3X
P0301: Cylinder 1 Misfire Detected. tested relay and fuse, jumped relay works fine. disconnected vacumm solenoid, verified vacumm and air flow. Jumped relay again and verified air flow to engine by 02 stats. snap-on mt2500 no ability to activate from scanner. Intermittently hear sec AIR motor ru...
May 10, 2007
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FMYU70E81
could this be intake gasket leaking or plugged cat
May 10, 2007
1998 Ford Windstar GL 3.8L Misfire VIN: 2FMZA5145W
P0301: missfire 1 cylinder. ... WITH ONE FROM A WRECKER. NOW IT KEEPS SETTING CODE P0301, MISSFIRE #1 CYLINDER. HAVE CHECKED ALL GROUNDS AND POWERS. ALL SENSORS AND INPUTS TEST OK. AT APPROX 60MPH YOU CAN FEEL THIS THING TUGGING AND HESITATING UNTIL THE CHECK ENGINE LIGHT COMES ON AND BE...
May 16, 2007
1998 Subaru Legacy Outback 2.5L Misfire, MIL Lamp on VIN: 4S3BG6851W
P0301: Cylinder 1 Misfire Detected. We replaced the short block (from dealer) about 6 mo. ago and cleaned heads and set valve clearance. Customer says check engine light has been on for a month with misfires on all cylinders. We cleared the codes and test drove. Engine misses at freeway speed un...
May 19, 2007
2005 Subaru Outback XT 2.5L Misfire, MIL Lamp on VIN: 4S4BP67C25
P0301: Cylinder 1 Misfire Detected. this car has had an ongoing issue for weeks, the dealer cant seem to find it and now its out of warranty??? i swapped coil;s and plugs from cyl to cyl but it keeps coming up a miss on cyl #1. it can be felt fairly strong but at times it seems to run ok. compre...
May 21, 2007
1997 Dodge B2500 3.9L Cuts out, Misfire, MIL Lamp on VIN: 2B7HB21X3V
P0301: Cylinder 1 Misfire Detected. Van originally came in with a low charging voltage & misfire # 4 cylinder code with a complaint of no power. Scoped the ignition & found a bad plug wire to number 4. Replaced the set with a new cap & rotor. Looked good on the scope & test drove...
May 23, 2007
2001 Acura MDX 3.5L Misfire VIN: 2HYD18651H
P0301: Cylinder 1 Misfire Detected. i am pulling my hair out on this car. the only thing that i have noticed lately is in freeze frame occasionally stft1 was record at 12% can not get it to do that when i am monitoring it. i do not every fell the engine misfire went the cel comes on. and sometim...
May 24, 2007
2004 Honda Accord EX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCM81794
P0301: Cylinder 1 Misfire Detected. Don't want to shoot from the hip on this one. There is obviously something common to all cylinders causing this rough idle. I have spent a lot of time looking at data, and cannot find anything out of the ordinary. This car seems to drive perfectly fine, smooth...
May 30, 2007
2000 Jeep Cherokee Sport 4.0L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1J4FF48STY
P0301: Cylinder 1 Misfire Detected. Jeep came in yesterday, repaired 1494 bad hose at intake, on road test, missfire felt and seen in misfire counter, only on #1. On heavy accel, and above 2800 rpm, regular and heavy surging, and fuel pressure swings +/- 10 psi from spec, but doesn't drop. Repla...
May 30, 2007
1998 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR52R9W
P0301: Cylinder 1 Misfire Detected. missfire codes #1#2#3. also, codes had been cleared recently. changed plugs which had oil on them due to leaky valve cover gaskets (cust. does not want to spend $ to replace gaskets) cleared codes and still miss and light on immediatly. checked codes, got miss...
May 31, 2007
2002 Nissan Maxima SE 3.5L Misfire VIN: JN1DA31D82
P0301: Cylinder 1 Misfire Detected. Hi, Have a doosy here, vehicle is a 2002 Nissan Maxima 3.5. Have no spark on cylinder #1. There is no pulse to coil. Checked continuity from coil to computer on signal wire - 0 ohms. Visually checked reluctor rings on camshafts. Checked ring on torque converte...
May 31, 2007
2006 Land Rover Range Rover Supercharged 4.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: SALMF13426
This one has been an issue for the past three weeks in my shop.Only on cold start when the vehicle is put in drive it will misfire and fall flat on its face.Once you cycle the ignition the problem will go away or if you let it run for approximately 2 minutes.I...
May 02, 2007
2002 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K92
P0301: cylinder 1 misfire detected. ... help would be greatly appreciated. Vehicle came into our shop from the dealer which was diagnosed as a valve problem. The customers complaint is a rough idle. No misfire can be felt on acceleration or when cruising. Found a history code p0300 stored. Check...
May 03, 2007
1999 Cadillac Catera 3.0L Surge VIN: W06VR52R3X
P0301: Cylinder 1 Misfire Detected. tested relay and fuse, jumped relay works fine. disconnected vacumm solenoid, verified vacumm and air flow. Jumped relay again and verified air flow to engine by 02 stats. snap-on mt2500 no ability to activate from scanner. Intermittently hear sec AIR motor ru...
May 10, 2007
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FMYU70E81
could this be intake gasket leaking or plugged cat
May 10, 2007
1998 Ford Windstar GL 3.8L Misfire VIN: 2FMZA5145W
P0301: missfire 1 cylinder. ... WITH ONE FROM A WRECKER. NOW IT KEEPS SETTING CODE P0301, MISSFIRE #1 CYLINDER. HAVE CHECKED ALL GROUNDS AND POWERS. ALL SENSORS AND INPUTS TEST OK. AT APPROX 60MPH YOU CAN FEEL THIS THING TUGGING AND HESITATING UNTIL THE CHECK ENGINE LIGHT COMES ON AND BE...
May 16, 2007
1998 Subaru Legacy Outback 2.5L Misfire, MIL Lamp on VIN: 4S3BG6851W
P0301: Cylinder 1 Misfire Detected. We replaced the short block (from dealer) about 6 mo. ago and cleaned heads and set valve clearance. Customer says check engine light has been on for a month with misfires on all cylinders. We cleared the codes and test drove. Engine misses at freeway speed un...
May 19, 2007
2005 Subaru Outback XT 2.5L Misfire, MIL Lamp on VIN: 4S4BP67C25
P0301: Cylinder 1 Misfire Detected. this car has had an ongoing issue for weeks, the dealer cant seem to find it and now its out of warranty??? i swapped coil;s and plugs from cyl to cyl but it keeps coming up a miss on cyl #1. it can be felt fairly strong but at times it seems to run ok. compre...
May 21, 2007
1997 Dodge B2500 3.9L Cuts out, Misfire, MIL Lamp on VIN: 2B7HB21X3V
P0301: Cylinder 1 Misfire Detected. Van originally came in with a low charging voltage & misfire # 4 cylinder code with a complaint of no power. Scoped the ignition & found a bad plug wire to number 4. Replaced the set with a new cap & rotor. Looked good on the scope & test drove...
May 23, 2007
2001 Acura MDX 3.5L Misfire VIN: 2HYD18651H
P0301: Cylinder 1 Misfire Detected. i am pulling my hair out on this car. the only thing that i have noticed lately is in freeze frame occasionally stft1 was record at 12% can not get it to do that when i am monitoring it. i do not every fell the engine misfire went the cel comes on. and sometim...
May 24, 2007
2004 Honda Accord EX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCM81794
P0301: Cylinder 1 Misfire Detected. Don't want to shoot from the hip on this one. There is obviously something common to all cylinders causing this rough idle. I have spent a lot of time looking at data, and cannot find anything out of the ordinary. This car seems to drive perfectly fine, smooth...
May 30, 2007
2000 Jeep Cherokee Sport 4.0L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1J4FF48STY
P0301: Cylinder 1 Misfire Detected. Jeep came in yesterday, repaired 1494 bad hose at intake, on road test, missfire felt and seen in misfire counter, only on #1. On heavy accel, and above 2800 rpm, regular and heavy surging, and fuel pressure swings +/- 10 psi from spec, but doesn't drop. Repla...
May 30, 2007
1998 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR52R9W
P0301: Cylinder 1 Misfire Detected. missfire codes #1#2#3. also, codes had been cleared recently. changed plugs which had oil on them due to leaky valve cover gaskets (cust. does not want to spend $ to replace gaskets) cleared codes and still miss and light on immediatly. checked codes, got miss...
May 31, 2007
2002 Nissan Maxima SE 3.5L Misfire VIN: JN1DA31D82
P0301: Cylinder 1 Misfire Detected. Hi, Have a doosy here, vehicle is a 2002 Nissan Maxima 3.5. Have no spark on cylinder #1. There is no pulse to coil. Checked continuity from coil to computer on signal wire - 0 ohms. Visually checked reluctor rings on camshafts. Checked ring on torque converte...
May 31, 2007