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P0304 Diagnostic Trouble Code Discussion for May 2012

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
1996 Ford Windstar GL 3.8L Misfire, MIL Lamp on VIN: 2FMDA5143T
P0304: misfire cylinder 4. i got this windstar that have no spark on cylinder 4 and 5, the coil has been replaced at ford dealership one year ago. Im a bit confused because these 2 cylinder are not in the same coil and the coil is not really old..What can i look for because trying anoth...
May 06, 2012
2002 BMW 530i 3.0L Misfire VIN: WBADT63442
P0304: misfire on number 4 cyl. Hello my fellow techs.Got this 530i that had blown headgasket.We swapped heads with matching numbers.I have misfires on #4cyl and #6cyl when cold started.After a few moments # 4cyl seems to smooth out,but # 6 refuses to quit missing at idle.When you give it th...
May 07, 2012
2006 Volkswagen Jetta GLI 2.0L Misfire, MIL Lamp on VIN: 3VWXJ71K46
P0304: cyl 4 misfire. The car came in with an intermitant c.e.l on. On cold start-up cyl #4 will misfire for a short time and then run normal after that until the next cold start. First we swapped ign coil and plugs between cyl 3-4. Code po304 set on the next cold start. After expl...
May 08, 2012
2006 Honda Pilot EX 3.5L Misfire VIN: 5FNYF28636
P0304: Cylinder 4 Misfire Detected. ... cylinders. P0301/P0302/P0303/P0304/P0305/P0306. We have adjusted the valves, sent the car to the dealer to have the latest software installed per TSB. The misfire is not like all the others I have read about on IATN, as they ...
May 09, 2012
2007 Hyundai Tucson SE 2.7L MIL Lamp on, bucks under accel VIN: KM8JN72D17
P0304: Cylinder 4 Misfire Detected. Hyundai techs-Ty J please help!This Tuscon was brought in for complaint of truck won't go over 20 mph-shaking & "stuttering" @ higher speeds along with CEL on.Initial test drive was hard to get up to 20mph but 20mph & up the whole truck bucks &...
May 09, 2012
2002 BMW 530i 3.0L Misfire VIN: WBADT63442
P0304: misfire on number 4 cyl. Hello my fellow techs.Got this 530i that had blown headgasket.We swapped heads with matching numbers.I have misfires on #4cyl and #6cyl when cold started.After a few moments # 4cyl seems to smooth out,but # 6 refuses to quit missing at idle.When you give it th...
May 11, 2012
1999 Honda CR-V EX 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JHLRD1866X
P0304: Cylinder 4 Misfire Detected. When first started cold and thrown in gear sometimes will idle low and die/stall. If given more throttle in park will bog down and back fire through intake and hard to get it to go to even 3k rpm. When warmed up will not go above 5k rpm in park/neutral. Once w...
May 11, 2012
2003 Jaguar S-Type 4.2L Excessive Emissions, Hesitation, Misfire, MIL Lamp on, reduced pwr display VIN: SAJGA03U13
This car came in because it failed the emission test on friday. It came back today (monday) and the customer told us about the rough running on the highway. It will not accelerate to pass, it bucks then the reduced power display comes on and the MIL flashes. I...
May 14, 2012
1999 Honda CR-V EX 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JHLRD1866X
P0304: Cylinder 4 Misfire Detected. When first started cold and thrown in gear sometimes will idle low and die/stall. If given more throttle in park will bog down and back fire through intake and hard to get it to go to even 3k rpm. When warmed up will not go above 5k rpm in park/neutral. Once w...
May 16, 2012
1997 Toyota Corolla 1.6L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 2T1BA02EXV
P0304: Cylinder 4 Misfire Detected. ... not idle,when i got it the o2 sensor was unhooked,blowing black smoke out the tail pipe and it would not idle.we put spark plugs ,distribtor cap and rotor button,oil was full of gas so we changed oil.then it would idle but sill blowing black smoke out the ...
May 16, 2012
2001 Ford Escort SE 2.0L Misfire, MIL Lamp on VIN: 3FAFP13PX1
P0304: cylinder 4 misfire detected. I have replaced spark plugs with motor craft ,spark plug wires, cylinder #4 fuel injector and coil pack. The car will run good sometimes for 2 days at a time and then most of the time problem will occur after you have been riding it and let it sit for an hour ...
May 18, 2012
2007 Audi A3 2.0L Misfire VIN: WAUHF78PX7
P0304: Cylinder 4 Misfire. ... Came in initially with slight noisy, mechanical fuel pump and bad running with about 130K on Odometer. Cam follower had hole punched thru. We replaced the Hi Press Pump and Follower and changed oil.Cam lobe a little scuffed not wiped out at all. Had worn p...
May 23, 2012
2004 Honda Civic GX 1.7L Misfire VIN: 1HGEN26524
P0304: Cylinder 4 Misfire Detected. To all Techs, This Honda is equipped with a CNG fuel system. We replaced all new spark plugs and ignition coils. Engine experience misfire every once in a while especially under load. During misfire condition, fuel injection pulse and ignition coil trigger was...
May 23, 2012
1999 Ford E-350 Econoline Club Wagon Custom 6.8L Misfire VIN: 1FTSS34S0X
P0304: Fault Cylinder 4 Misfire Detected. Van was driven in running poorly, CEL was on. Immediately noticed PCV hose had been left disconnected after customer replaced heater hose. Plugged it in, pulled codes for cyl head overtemp active and overtemp sensed, H02S11 indicates lean, as well as random mi...
May 29, 2012
1996 Ford Windstar GL 3.8L Misfire, MIL Lamp on VIN: 2FMDA5143T
P0304: misfire cylinder 4. i got this windstar that have no spark on cylinder 4 and 5, the coil has been replaced at ford dealership one year ago. Im a bit confused because these 2 cylinder are not in the same coil and the coil is not really old..What can i look for because trying anoth...
May 06, 2012
2002 BMW 530i 3.0L Misfire VIN: WBADT63442
P0304: misfire on number 4 cyl. Hello my fellow techs.Got this 530i that had blown headgasket.We swapped heads with matching numbers.I have misfires on #4cyl and #6cyl when cold started.After a few moments # 4cyl seems to smooth out,but # 6 refuses to quit missing at idle.When you give it th...
May 07, 2012
2006 Volkswagen Jetta GLI 2.0L Misfire, MIL Lamp on VIN: 3VWXJ71K46
P0304: cyl 4 misfire. The car came in with an intermitant c.e.l on. On cold start-up cyl #4 will misfire for a short time and then run normal after that until the next cold start. First we swapped ign coil and plugs between cyl 3-4. Code po304 set on the next cold start. After expl...
May 08, 2012
2006 Honda Pilot EX 3.5L Misfire VIN: 5FNYF28636
P0304: Cylinder 4 Misfire Detected. ... cylinders. P0301/P0302/P0303/P0304/P0305/P0306. We have adjusted the valves, sent the car to the dealer to have the latest software installed per TSB. The misfire is not like all the others I have read about on IATN, as they ...
May 09, 2012
2007 Hyundai Tucson SE 2.7L MIL Lamp on, bucks under accel VIN: KM8JN72D17
P0304: Cylinder 4 Misfire Detected. Hyundai techs-Ty J please help!This Tuscon was brought in for complaint of truck won't go over 20 mph-shaking & "stuttering" @ higher speeds along with CEL on.Initial test drive was hard to get up to 20mph but 20mph & up the whole truck bucks &...
May 09, 2012
2002 BMW 530i 3.0L Misfire VIN: WBADT63442
P0304: misfire on number 4 cyl. Hello my fellow techs.Got this 530i that had blown headgasket.We swapped heads with matching numbers.I have misfires on #4cyl and #6cyl when cold started.After a few moments # 4cyl seems to smooth out,but # 6 refuses to quit missing at idle.When you give it th...
May 11, 2012
1999 Honda CR-V EX 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JHLRD1866X
P0304: Cylinder 4 Misfire Detected. When first started cold and thrown in gear sometimes will idle low and die/stall. If given more throttle in park will bog down and back fire through intake and hard to get it to go to even 3k rpm. When warmed up will not go above 5k rpm in park/neutral. Once w...
May 11, 2012
2003 Jaguar S-Type 4.2L Excessive Emissions, Hesitation, Misfire, MIL Lamp on, reduced pwr display VIN: SAJGA03U13
This car came in because it failed the emission test on friday. It came back today (monday) and the customer told us about the rough running on the highway. It will not accelerate to pass, it bucks then the reduced power display comes on and the MIL flashes. I...
May 14, 2012
1999 Honda CR-V EX 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JHLRD1866X
P0304: Cylinder 4 Misfire Detected. When first started cold and thrown in gear sometimes will idle low and die/stall. If given more throttle in park will bog down and back fire through intake and hard to get it to go to even 3k rpm. When warmed up will not go above 5k rpm in park/neutral. Once w...
May 16, 2012
1997 Toyota Corolla 1.6L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 2T1BA02EXV
P0304: Cylinder 4 Misfire Detected. ... not idle,when i got it the o2 sensor was unhooked,blowing black smoke out the tail pipe and it would not idle.we put spark plugs ,distribtor cap and rotor button,oil was full of gas so we changed oil.then it would idle but sill blowing black smoke out the ...
May 16, 2012
2001 Ford Escort SE 2.0L Misfire, MIL Lamp on VIN: 3FAFP13PX1
P0304: cylinder 4 misfire detected. I have replaced spark plugs with motor craft ,spark plug wires, cylinder #4 fuel injector and coil pack. The car will run good sometimes for 2 days at a time and then most of the time problem will occur after you have been riding it and let it sit for an hour ...
May 18, 2012
2007 Audi A3 2.0L Misfire VIN: WAUHF78PX7
P0304: Cylinder 4 Misfire. ... Came in initially with slight noisy, mechanical fuel pump and bad running with about 130K on Odometer. Cam follower had hole punched thru. We replaced the Hi Press Pump and Follower and changed oil.Cam lobe a little scuffed not wiped out at all. Had worn p...
May 23, 2012
2004 Honda Civic GX 1.7L Misfire VIN: 1HGEN26524
P0304: Cylinder 4 Misfire Detected. To all Techs, This Honda is equipped with a CNG fuel system. We replaced all new spark plugs and ignition coils. Engine experience misfire every once in a while especially under load. During misfire condition, fuel injection pulse and ignition coil trigger was...
May 23, 2012
1999 Ford E-350 Econoline Club Wagon Custom 6.8L Misfire VIN: 1FTSS34S0X
P0304: Fault Cylinder 4 Misfire Detected. Van was driven in running poorly, CEL was on. Immediately noticed PCV hose had been left disconnected after customer replaced heater hose. Plugged it in, pulled codes for cyl head overtemp active and overtemp sensed, H02S11 indicates lean, as well as random mi...
May 29, 2012