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P0304 Diagnostic Trouble Code Discussion for April 2007

Cylinder 4 Misfire Detected

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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2004 Ford Ranger XL 3.0L Poor Idle Quality, Misfire, MIL Lamp on
P0304: Misfire Cylinder 4. Hi Guys, This Ranger is driving me nuts. Getting a constant engine light ONLY at idle. Misfire codes. Then, I can drive the vehicle and the codes and engine light will go out! When it goes back to idle, it's very rough and you'll eventually get a regular misf...
April 03, 2007
2000 Acura Integra LS 1.8L MIL Lamp on VIN: JH4DC4459Y
P0304: Cylinder 4 Misfire Detected. This vehicle came in with a P0304 (cylinder #4 misfire). Vehicle was not misfiring but freeze frame data shows it whiel driving. With the current mileage we replaced the spark plugs, ignition wires, cap and rotor. Cleared the code and started the vehicle to fi...
April 04, 2007
1999 Ford Windstar SE 3.8L Misfire, MIL Lamp on VIN: 2FMZA5247X
P0304: misfire cylinder 4. This van came in with the MIL on. The code was P0306 (missfire Cyl. 6). It hadn't had a tune up in a long time so we started with that. After replacing plugs & wires the miss was less and had also changed to Cyl. 4. I found that the miss was only when hot ...
April 05, 2007
2002 Jaguar X-Type 3.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: SAJEA51C4Z
P0304: cyl 4 misfire. this vehicle came into the shop with misfire codes on drivers bank,rough run and some engine noise. found fuel in oil& fouled plugs.checked compression(fine) replace fuel fouled plugs,changed oil,cleared codes. on road test ran fine at first and then same ...
April 18, 2007
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GNDT13S22
P0304: Cylinder 4 Misfire Detected. Hello all. I have a good one for you GM techs out there. This 2002 Trailblazer came in for bogging down at idle and client feels engine miss. The misfire counter on the Modis counts up and then resets on cylinders 3 and 4. We replaced the spark plugs and boots...
April 19, 2007
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1ND52J61
P0304: missfire cylinder 4. vehicle came in with missfire. code p0304. found ignition wire terminal on coil pack for cyl #4 corroded. installed new plugs and wires. miss fire still present. swapped coil pack with known good and brand new coil packs, same results. installed vacuum tubes b...
April 23, 2007
2000 Lexus LX470 4.7L Misfire VIN: JT6HT00W3Y
P0304: Cylinder 4 Misfire Detected. Has anybody had random/multiple cylinder and specific cyl misfire experience with this type vehicle? Relatively new Iridium plugs and one recent coil replacement (now gone bad after 6 months). Any help/insight and time savings is greatly appreciated. Sincere...
April 25, 2007
2004 GMC C5500 Topkick C5C042 6.6L No Start, Hesitation, Misfire, MIL Lamp on VIN: 1GDE5C1254
P0304: cylinder 4 misfire detected. Hi everyone This vehicel came to shop this morning. This vehicle crank no start, no metter cold ot hot but It will start everytime we spray cab cleaner, idle feel OK. but when we road test, this vehicle was knocking alot, missing, and white smoke. I followed t...
April 30, 2007