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P0301 Diagnostic Trouble Code Discussion for March 2012

Cylinder 1 Misfire Detected


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Trouble Ticket Help Requests for DTC P0301
Help Request Posted
2004 Ford F-150 FX4 5.4L Misfire VIN: 1FTPW14544
P0301: missfire present cyl 1. vehicle was towed into shop for bad missfire checked and found random missfire codes on all cyclinders checked and found plugs still original removed and replaced all plugs with factory plugs and replaced all coils with factory coil as well. upon start up of v...
March 01, 2012
1997 Ford Explorer Sport 4.0L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FMCU24X7V
P0301: 1 cylinder missfire. I've been fighting an engine miss for weeks on this vehilce with no results and unhappy customer. What am I missing. My vacumm has a slight flutter on idle, Valve giuld worn or what??? Have been reading about running compression test. Have not done this. Shoul...
March 04, 2012
2002 Jeep Liberty Sport 3.7L Misfire VIN: 1J4GL38K02
P0301: Cylinder 1 Misfire Detected. I am stumped on a 2002 liberty. came in with missfire running rough CES light flashing.. scan codes #1 missfire. tryed basics, coil, plug and checked injector. veh only acting up when driving nd it is intermittent.cycle the ignition and problem goes away for a...
March 05, 2012
2000 Volkswagen Jetta GLS 2.0L Misfire, MIL Lamp on VIN: 3VWSC29M0Y
P0301: 1 cyl. misfire. From other shop w/code p1500 (17908)fuel pump relay-j17 electrical malfuction in circuit and telling me the vehicle was cut off and stall out. Replaced the fuel pump relay w/ updtate one.Old part#1J0 906 383 TO 1J0 906 383C. After replacing the new relay, star...
March 06, 2012
2003 Chevrolet Malibu LS 3.1L Misfire VIN: 1G1NE52J73
P0301: cyl 1 miss. Well I have a fun one here. This 03 Malibu came to us with a dead #1 cyl. we found the exhaust valve rocker stud pulled up. After repairing that we now have misfires on #1 and 4 cyls. I have swapped coils, no change. Tried known good ICM, no change. Scoped cra...
March 08, 2012
2000 Volkswagen Jetta GLS 2.0L Misfire, MIL Lamp on VIN: 3VWSC29M0Y
P0301: 1 cyl. misfire. From other shop w/code p1500 (17908)fuel pump relay-j17 electrical malfuction in circuit and telling me the vehicle was cut off and stall out. Replaced the fuel pump relay w/ updtate one.Old part#1J0 906 383 TO 1J0 906 383C. After replacing the new relay, star...
March 08, 2012
1999 Toyota Avalon XL 3.0L Poor Idle Quality, Misfire VIN: 4T1BF18B8X
P0301: Cylinder 1 Misfire Detected. ... question my career choice sometimes. Car came in running fine. We found leaking valve covers and replaced the gaskets. Also installed new plugs (NGK). Upon finishing, fired the car up and it ran terrible, with a pop in the catalytic convertor area. CEL fla...
March 13, 2012
2005 Toyota Echo 1.5L Misfire VIN: JTDBT12305
P0301: Cylinder 1 Misfire Detected. I have put multiple coils on the same two cylinders evevry couple of weeks. After replacement the car runs great.
March 16, 2012
2003 Mazda 6 S 3.0L MIL Lamp on VIN: 1YVFP80D43
P0301: Cylinder 1 Misfire Detected. ... Has a p0301 for cylinder 1 missfire. I have replaced the coil and plug with dealer parts and the injector as well. I cant get it to come back on with me. The cust usually has to drive it for a week before the light will come back on. He never complains of ...
March 21, 2012
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2DM58WX1
P0301: Cylinder 1 Misfire Detected. This truck runs sweet but flags misfire codes and even flashes above 1500rpm. Customer wanted a tune-up for maintenance purposes anyway, so the dealer-specified plugs were installed. Coils all put back in proper place (#6 boot shorter than the rest). No change...
March 24, 2012
2003 Mazda 6 S 3.0L MIL Lamp on VIN: 1YVFP80D43
P0301: Cylinder 1 Misfire Detected. ... Has a p0301 for cylinder 1 missfire. I have replaced the coil and plug with dealer parts and the injector as well. I cant get it to come back on with me. The cust usually has to drive it for a week before the light will come back on. He never complains of ...
March 28, 2012
2004 Mazda 6 S 3.0L Misfire, MIL Lamp on VIN: 1YVFP80D84
P0301: Cylinder 1 Misfire Detected. This vehicle runs great, never acts like it ever misfires, but when driven and reaching approx 3750-4000rpm, the check eng light then flashes. If you speed up or down, then the light just stays on steady, but this is always able to duplicate on every road test...
March 28, 2012