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P0304 Diagnostic Trouble Code Discussion for March 2011

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2003 Pontiac Vibe 1.8L Misfire, MIL Lamp on VIN: 5Y25M628X3
P0304: Cylinder 4 Misfire Detected. has anyone run into a problem that will cause multiple coil and or plug failures ?? powers and grounds are good . is there a TSB that i can't find ?? Misfire seems to move from cyl to cyl.Possible injector or regulator issue ?? Any help would be appreciated !
March 04, 2011
1997 Ford Taurus SHO 3.4L Misfire, MIL Lamp on VIN: 1FALP54NXV
P0304: 4 Misfire. Here I go again with a problem child Ford. Received vehicle and did a quick scan and found the codes listed above. I cleared them and did a KOEO and no codes were there. Did the KOER and P1408 showed up but not the misfire code. The car still runs really bad a...
March 08, 2011
2003 Hyundai Accent GL 1.6L Misfire VIN: KMHCF35C43
P0304: Cylinder 4 Misfire Detected. I check tps sensor test good replace spark plugs & wires replace crank sensor because its the trigger for coils check for vacuum leaks found none car will run good for weeks at a time with no misfire.thanks for your help.
March 09, 2011
2004 Kia Sedona EX 3.5L MIL Lamp on VIN: KNDUP13194
P0304: Cylinder 4 Misfire Detected. No symptoms found related to codes, customer made no mention of any driveability issues. Freeze frame data shows only misfire code data at 63 mph, 2800 rpm. Recreated the conditions and found to achieve 2800 at that cruise speed, O/D was off, but no symptoms f...
March 10, 2011
1998 Ford F-150 XLT 4.6L Misfire, MIL Lamp on VIN: 2FTZX08W1W
P0304: Cyl 3 miss. Help please this ford is a good customer this truck as a history of po 304 occurs at first every couple months now will set code in about 10 days after driven about 20 miles #4 will start missing compression 160 ltf and stft both good i am going to try coil pa...
March 11, 2011
2003 Dodge Stratus SE 2.4L Hesitation, Misfire, MIL Lamp on
P0304: Cylinder 4 Misfire Detected. car was hesitating/jerking upon acceleration. check engine light was on. before repairing, plugs had oil on threads but not electrode, plugs had small traces of white deposits on them, misfire would happen intermittently or as it seems, can feel misfire very d...
March 13, 2011
2004 Ford F-150 Heritage XL 4.2L Misfire, MIL Lamp on VIN: 2FTRF172X4
P0304: misfire cyl 4. ... thinking about it.The vehicle came in with customer complaint of rough idle.Check engine light was found to be on,and we pulled codes p0304,and p0316 out of it.First tech to have his hands in it wanted to sell plugs and wi...
March 14, 2011
1998 Ford F-150 XLT 4.6L Misfire, MIL Lamp on VIN: 2FTZX08W1W
P0304: Cyl 3 miss. Help please this ford is a good customer this truck as a history of po 304 occurs at first every couple months now will set code in about 10 days after driven about 20 miles #4 will start missing compression 160 ltf and stft both good i am going to try coil pa...
March 15, 2011
2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25
P0304: Cylinder 4 Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...
March 17, 2011
2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25
P0304: Cylinder 4 Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...
March 18, 2011
1998 Subaru Legacy Outback 2.5L MIL Lamp on VIN: 4S3BG6855W
P0304: Cylinder 4 Misfire Detected. ... sets a P0304 & P0303 at high speed and low load. P0304 sets more often than the P0303. When it sets the codes NO MISFIRE IS FELT AT ALL! The only thing that is noticed is that the CEL starts flashing. If the load is increased or the speed is decreased ...
March 19, 2011
1996 BMW 328i 2.8L Hesitation, Misfire, MIL Lamp on VIN: WBACD4321T
For all BMW techs need help with this car has rough idle every two or three minutes and emissions go high almost 2500 ppm and hesitates for a while for about half a minute and then the emissions go down after that runs normal for another three minutes then emi...
March 24, 2011
2005 Volkswagen Passat GLS 4 Motion 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WVWDD63B95
P0304: cylinder 4 misfire. Hi, I can't believe I am asking such a seemingly simple question. But after 3 hours I cannot find the PCV valve on this car. I have googled it, searched Alldata, and looked all over the vehicle. Everything says it is under the intake manifold. I still cant fin...
March 24, 2011
1999 Cadillac Seville SLS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KS54Y2Y
P0304: missfire cylinder 4. Ok well I hope someone out there has run in to this problem before.I have this Cadillac,1999 SLS it has misfire on cylinder #4 dead miss also has slight miss on #5 anyway I have tried everything I can think of to find the cause of this misfire,Came in with com...
March 28, 2011
2001 Acura CL Premium 3.2L No Start, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 19UYA42431
P0304: Cylinder 4 Misfire Detected. ... complained that randomly, while sitting at a stop light for 1 min or more, would run rough and die. Restart after few minutes. Scanned vehicle and found the P1071 fuel trim code. Cleared code drove car for a couple days and ...
March 30, 2011
2006 BMW 325xi 3.0L No Start VIN: WBAVD135X6
P0304: Cyl 4 missfire. Thanks to all of you that take the time to read my help request. I have very limited experience with Bimmer's. I am thinking that I need to replace both camshaft sensors, but I am not sure why or if they actually are at fault here. It just seems strange to me ...
March 30, 2011
2003 Pontiac Vibe 1.8L Misfire, MIL Lamp on VIN: 5Y25M628X3
P0304: Cylinder 4 Misfire Detected. has anyone run into a problem that will cause multiple coil and or plug failures ?? powers and grounds are good . is there a TSB that i can't find ?? Misfire seems to move from cyl to cyl.Possible injector or regulator issue ?? Any help would be appreciated !
March 04, 2011
1997 Ford Taurus SHO 3.4L Misfire, MIL Lamp on VIN: 1FALP54NXV
P0304: 4 Misfire. Here I go again with a problem child Ford. Received vehicle and did a quick scan and found the codes listed above. I cleared them and did a KOEO and no codes were there. Did the KOER and P1408 showed up but not the misfire code. The car still runs really bad a...
March 08, 2011
2003 Hyundai Accent GL 1.6L Misfire VIN: KMHCF35C43
P0304: Cylinder 4 Misfire Detected. I check tps sensor test good replace spark plugs & wires replace crank sensor because its the trigger for coils check for vacuum leaks found none car will run good for weeks at a time with no misfire.thanks for your help.
March 09, 2011
2004 Kia Sedona EX 3.5L MIL Lamp on VIN: KNDUP13194
P0304: Cylinder 4 Misfire Detected. No symptoms found related to codes, customer made no mention of any driveability issues. Freeze frame data shows only misfire code data at 63 mph, 2800 rpm. Recreated the conditions and found to achieve 2800 at that cruise speed, O/D was off, but no symptoms f...
March 10, 2011
1998 Ford F-150 XLT 4.6L Misfire, MIL Lamp on VIN: 2FTZX08W1W
P0304: Cyl 3 miss. Help please this ford is a good customer this truck as a history of po 304 occurs at first every couple months now will set code in about 10 days after driven about 20 miles #4 will start missing compression 160 ltf and stft both good i am going to try coil pa...
March 11, 2011
2003 Dodge Stratus SE 2.4L Hesitation, Misfire, MIL Lamp on
P0304: Cylinder 4 Misfire Detected. car was hesitating/jerking upon acceleration. check engine light was on. before repairing, plugs had oil on threads but not electrode, plugs had small traces of white deposits on them, misfire would happen intermittently or as it seems, can feel misfire very d...
March 13, 2011
2004 Ford F-150 Heritage XL 4.2L Misfire, MIL Lamp on VIN: 2FTRF172X4
P0304: misfire cyl 4. ... thinking about it.The vehicle came in with customer complaint of rough idle.Check engine light was found to be on,and we pulled codes p0304,and p0316 out of it.First tech to have his hands in it wanted to sell plugs and wi...
March 14, 2011
1998 Ford F-150 XLT 4.6L Misfire, MIL Lamp on VIN: 2FTZX08W1W
P0304: Cyl 3 miss. Help please this ford is a good customer this truck as a history of po 304 occurs at first every couple months now will set code in about 10 days after driven about 20 miles #4 will start missing compression 160 ltf and stft both good i am going to try coil pa...
March 15, 2011
2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25
P0304: Cylinder 4 Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...
March 17, 2011
2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25
P0304: Cylinder 4 Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...
March 18, 2011
1998 Subaru Legacy Outback 2.5L MIL Lamp on VIN: 4S3BG6855W
P0304: Cylinder 4 Misfire Detected. ... sets a P0304 & P0303 at high speed and low load. P0304 sets more often than the P0303. When it sets the codes NO MISFIRE IS FELT AT ALL! The only thing that is noticed is that the CEL starts flashing. If the load is increased or the speed is decreased ...
March 19, 2011
1996 BMW 328i 2.8L Hesitation, Misfire, MIL Lamp on VIN: WBACD4321T
For all BMW techs need help with this car has rough idle every two or three minutes and emissions go high almost 2500 ppm and hesitates for a while for about half a minute and then the emissions go down after that runs normal for another three minutes then emi...
March 24, 2011
2005 Volkswagen Passat GLS 4 Motion 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WVWDD63B95
P0304: cylinder 4 misfire. Hi, I can't believe I am asking such a seemingly simple question. But after 3 hours I cannot find the PCV valve on this car. I have googled it, searched Alldata, and looked all over the vehicle. Everything says it is under the intake manifold. I still cant fin...
March 24, 2011
1999 Cadillac Seville SLS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KS54Y2Y
P0304: missfire cylinder 4. Ok well I hope someone out there has run in to this problem before.I have this Cadillac,1999 SLS it has misfire on cylinder #4 dead miss also has slight miss on #5 anyway I have tried everything I can think of to find the cause of this misfire,Came in with com...
March 28, 2011
2001 Acura CL Premium 3.2L No Start, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 19UYA42431
P0304: Cylinder 4 Misfire Detected. ... complained that randomly, while sitting at a stop light for 1 min or more, would run rough and die. Restart after few minutes. Scanned vehicle and found the P1071 fuel trim code. Cleared code drove car for a couple days and ...
March 30, 2011
2006 BMW 325xi 3.0L No Start VIN: WBAVD135X6
P0304: Cyl 4 missfire. Thanks to all of you that take the time to read my help request. I have very limited experience with Bimmer's. I am thinking that I need to replace both camshaft sensors, but I am not sure why or if they actually are at fault here. It just seems strange to me ...
March 30, 2011