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P0307 Diagnostic Trouble Code Discussion for August 2013

Cylinder 7 Misfire Detected


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Trouble Ticket Help Requests for DTC P0307
Help Request Posted
2000 Land Rover Range Rover SE 4.0L MIL Lamp on, random misfire bank VIN: SALPV1542Y
P0307: misfire cylinder 7. The problem has never happened for us, customer states it happens most often with engine not fully warmed up, and does not happen when engine is hot. We suspect it is coils but they do not fire all on one side. So what am I missing here. Thanks for the help. B...
August 09, 2013
2010 Ford E-450 Super Duty 6.8L MIL Lamp on VIN: 1FDFE4FS8A
P0307: Cyl. 7 misfire. Compression test good. Leak test for vacuum leaks. Tested & switched location of all coils, plugs & injectors. #1 & 7 Injectors click during misfire, spark stays constant. Checked wiring resistance from ecm to injectors & coils. Ran with altern...
August 20, 2013
2000 Audi A6 Quattro 4.2L Random misfire VIN: WAUZL64B0Y
P0307: Cyl. seven misfire. Engine runs smoothly just after start up cold (three-four seconds) Then it begines to misfire and run poorly. Engine is low on power. As the engine warms up it begine to run better but still has a slight misfire at idle. When it is test driven and het at WOT (...
August 27, 2013
2000 Audi A6 Quattro 4.2L Random misfire VIN: WAUZL64B0Y
P0307: Cyl. seven misfire. Engine runs smoothly just after start up cold (three-four seconds) Then it begines to misfire and run poorly. Engine is low on power. As the engine warms up it begine to run better but still has a slight misfire at idle. When it is test driven and het at WOT (...
August 28, 2013
2000 Land Rover Range Rover SE 4.0L MIL Lamp on, random misfire bank VIN: SALPV1542Y
P0307: misfire cylinder 7. The problem has never happened for us, customer states it happens most often with engine not fully warmed up, and does not happen when engine is hot. We suspect it is coils but they do not fire all on one side. So what am I missing here. Thanks for the help. B...
August 09, 2013
2010 Ford E-450 Super Duty 6.8L MIL Lamp on VIN: 1FDFE4FS8A
P0307: Cyl. 7 misfire. Compression test good. Leak test for vacuum leaks. Tested & switched location of all coils, plugs & injectors. #1 & 7 Injectors click during misfire, spark stays constant. Checked wiring resistance from ecm to injectors & coils. Ran with altern...
August 20, 2013
2000 Audi A6 Quattro 4.2L Random misfire VIN: WAUZL64B0Y
P0307: Cyl. seven misfire. Engine runs smoothly just after start up cold (three-four seconds) Then it begines to misfire and run poorly. Engine is low on power. As the engine warms up it begine to run better but still has a slight misfire at idle. When it is test driven and het at WOT (...
August 27, 2013
2000 Audi A6 Quattro 4.2L Random misfire VIN: WAUZL64B0Y
P0307: Cyl. seven misfire. Engine runs smoothly just after start up cold (three-four seconds) Then it begines to misfire and run poorly. Engine is low on power. As the engine warms up it begine to run better but still has a slight misfire at idle. When it is test driven and het at WOT (...
August 28, 2013