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P0304 Diagnostic Trouble Code Discussion for February 2009

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2004 Mercedes-Benz E320 4Matic 3.2L rich on bank 2 VIN: WDBUH82J24
P0304: CYL 4 misfire. Thanks for your time. Looking for another idea on this Mercedes. It came to us after it stalled & wouldn't restart in the bitter below 0 cold. Customer replaced iridium plugs and got it to start. Had the O2 & misfire codes in memory. Found the fuel pre...
February 03, 2009
2000 Mercury Mystique GS 2.0L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1MEFM6532Y
P0304: misfire 4 cyl. this car when cold runs fine. once it warms up it runs like its running out of fuel. scanner shows at times it running way lean but most of the time way rich at just above a steady cruise. the more you load it the worse it gets. when this is happening the inj ...
February 04, 2009
2004 Lincoln Navigator 5.4L Misfire VIN: 5LMFU28R94
P0304: cyl 4 misfire. i found water in coil tunnel #4 when changing coil blew out water, does not look like coolant and coolant level is not down at all, this misfire has come back 3 times. i have used some rtv around the coil to try to seal it from water no help. any input from yo...
February 05, 2009
2001 Toyota Celica GT 1.8L Cuts out, Misfire, MIL Lamp on VIN: JTDDR32T21
P0304: Cylinder 4 Misfire Detected. car come in with the low compress at # 2 cylinder, repalce the used engine. after customer pick up one week later, car come bacek with the a noise engine. replace the engine again. car start has misfires when it cold start. after the car full warm up the misfi...
February 05, 2009
2001 Mazda Tribute ES 3.0L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 4F2CU08121
P0304: Cylinder 4 Misfire Detected. Customer stalled while driving, car was towed to shop. No start. Checked for spark, weak red spark, cheked coils for ohms, tested the same on all coils. Compreesion test on 4,5 6, cylinders 220 psi. -IAC valve dead. clean throttle body. idles good when cold th...
February 06, 2009
2001 Toyota Celica GT 1.8L Cuts out, Misfire, MIL Lamp on VIN: JTDDR32T21
P0304: Cylinder 4 Misfire Detected. car come in with the low compress at # 2 cylinder, repalce the used engine. after customer pick up one week later, car come bacek with the a noise engine. replace the engine again. car start has misfires when it cold start. after the car full warm up the misfi...
February 06, 2009
2001 Honda CR-V SE 2.0L MIL Lamp on VIN: JHLRD187X1
P0304: Cylinder 4 Misfire Detected. Engine is running very smoothly. Do not believe miss fire is real. Can not determine if crank sensor in distributor is getting flakey. No supported testing found in ALL DATA. Seems VERY intermittant, only when cold. Contacted local Honda Guru, was told replace...
February 10, 2009
2004 Ford F-150 STX 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTRX12W64
We got 2004 f-150 with 4.6l engine came in with bad miss fire and MIL on.check the code memory has p171,p300,p354 and p304,p305,p307.Check vacum leak not detected.check exhust system no restriction.fuel pressure 41 psi at idle and 41-42 at high rpm.BAnk to o2 ...
February 11, 2009
2000 Saturn LS2 3.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G8JW52R7Y
P0304: Cylinder 4 Misfire Detected. This vehicle is not hitting on cylinders # 2, 4, 6, We did remove the front half of the plenum and checked for fire at the plugs and there is good fire. We removed the front plugs and cleaned them . We cleaned the intake and throttle plate. When we unplug the ...
February 11, 2009
2003 Lincoln LS 3.9L Misfire, MIL Lamp on VIN: 1LNHM87A23
P0304: missfire cly 4. Hello everyone, please help me with this Lincoln LS has multiple missfire.I fould most of the spark plug hoses were full of oil,so i replace valve cover gasket,spark plugs and 2 coils #4 and #5,then cleared code and test drove.Code PO354 and PO355 came back. I...
February 15, 2009
2006 Dodge Ram 1500 Truck ST 3.7L Misfire VIN: ID7HA18K76
P0304: Cylinder 4 Misfire Detected. vehicle came in for runs bad and ses lite on. scanned ecm found code po304. checked compression , changed plug, changed coil with known good, checked coil pulse good, shecked inj. pulse ,good. did inj. drop test 14 #. should run like a dream but doesn't, pleas...
February 19, 2009
2000 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCDL19WXY
P0304: Cylinder 4 Misfire Detected. Hello to all, this is my first time using this so bear with me. i have this astro that keep throwing missfire codes on cylinders 3 and 4. after clearing codes the missfire comes back on cylinder 3 then clear them again and the new code is for cylinder 4 only. ...
February 20, 2009
2000 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA5666Y
P0304: Cylinder 4 Misfire Detected. Hello everyone. We have a Acura 3.2TL that came in with a flashing MIL light and a misfire on almost every cylinder. We removed the intake manifolds and cleaned the clogged EGR ports but the misfire is still present. We checked compression- good. We can not ho...
February 24, 2009
1996 Audi A4 2.8L Misfire, MIL Lamp on VIN: WAUEA88D6T
P0304: misfire4. Vehicle comes in with a check engine light, Retrieved Dtc 302, 304, 300, Cleared codes test drive. During test drive after shifting from 2nd to 3rd and 3rd to 4th you could feel a hesitation or such that it felt like a bad sparkplug or wire. Spark plugs were r...
February 27, 2009
2002 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWPD63B62
P0304: cyl 4 misfire. CAME IN FIRST TIME FOR P0304, REPLACED ALL PLUGS AND # 4 COIL. ROAD TESTED AND ALL WAS FINE. CUSTOMER TOOK CAR, NEXT MORNING CAME BACK WITH CYL #3 MISFIRE, REPLACED #3 COIL, ROAD TESTED, ALL GOOD. CAME BACK A FEW DAYS LATER AND HAD CODE FOR#2 CYL MISFIRE, REPL...
February 27, 2009
2004 Mercedes-Benz E320 4Matic 3.2L rich on bank 2 VIN: WDBUH82J24
P0304: CYL 4 misfire. Thanks for your time. Looking for another idea on this Mercedes. It came to us after it stalled & wouldn't restart in the bitter below 0 cold. Customer replaced iridium plugs and got it to start. Had the O2 & misfire codes in memory. Found the fuel pre...
February 03, 2009
2000 Mercury Mystique GS 2.0L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1MEFM6532Y
P0304: misfire 4 cyl. this car when cold runs fine. once it warms up it runs like its running out of fuel. scanner shows at times it running way lean but most of the time way rich at just above a steady cruise. the more you load it the worse it gets. when this is happening the inj ...
February 04, 2009
2004 Lincoln Navigator 5.4L Misfire VIN: 5LMFU28R94
P0304: cyl 4 misfire. i found water in coil tunnel #4 when changing coil blew out water, does not look like coolant and coolant level is not down at all, this misfire has come back 3 times. i have used some rtv around the coil to try to seal it from water no help. any input from yo...
February 05, 2009
2001 Toyota Celica GT 1.8L Cuts out, Misfire, MIL Lamp on VIN: JTDDR32T21
P0304: Cylinder 4 Misfire Detected. car come in with the low compress at # 2 cylinder, repalce the used engine. after customer pick up one week later, car come bacek with the a noise engine. replace the engine again. car start has misfires when it cold start. after the car full warm up the misfi...
February 05, 2009
2001 Mazda Tribute ES 3.0L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 4F2CU08121
P0304: Cylinder 4 Misfire Detected. Customer stalled while driving, car was towed to shop. No start. Checked for spark, weak red spark, cheked coils for ohms, tested the same on all coils. Compreesion test on 4,5 6, cylinders 220 psi. -IAC valve dead. clean throttle body. idles good when cold th...
February 06, 2009
2001 Toyota Celica GT 1.8L Cuts out, Misfire, MIL Lamp on VIN: JTDDR32T21
P0304: Cylinder 4 Misfire Detected. car come in with the low compress at # 2 cylinder, repalce the used engine. after customer pick up one week later, car come bacek with the a noise engine. replace the engine again. car start has misfires when it cold start. after the car full warm up the misfi...
February 06, 2009
2001 Honda CR-V SE 2.0L MIL Lamp on VIN: JHLRD187X1
P0304: Cylinder 4 Misfire Detected. Engine is running very smoothly. Do not believe miss fire is real. Can not determine if crank sensor in distributor is getting flakey. No supported testing found in ALL DATA. Seems VERY intermittant, only when cold. Contacted local Honda Guru, was told replace...
February 10, 2009
2004 Ford F-150 STX 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTRX12W64
We got 2004 f-150 with 4.6l engine came in with bad miss fire and MIL on.check the code memory has p171,p300,p354 and p304,p305,p307.Check vacum leak not detected.check exhust system no restriction.fuel pressure 41 psi at idle and 41-42 at high rpm.BAnk to o2 ...
February 11, 2009
2000 Saturn LS2 3.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G8JW52R7Y
P0304: Cylinder 4 Misfire Detected. This vehicle is not hitting on cylinders # 2, 4, 6, We did remove the front half of the plenum and checked for fire at the plugs and there is good fire. We removed the front plugs and cleaned them . We cleaned the intake and throttle plate. When we unplug the ...
February 11, 2009
2003 Lincoln LS 3.9L Misfire, MIL Lamp on VIN: 1LNHM87A23
P0304: missfire cly 4. Hello everyone, please help me with this Lincoln LS has multiple missfire.I fould most of the spark plug hoses were full of oil,so i replace valve cover gasket,spark plugs and 2 coils #4 and #5,then cleared code and test drove.Code PO354 and PO355 came back. I...
February 15, 2009
2006 Dodge Ram 1500 Truck ST 3.7L Misfire VIN: ID7HA18K76
P0304: Cylinder 4 Misfire Detected. vehicle came in for runs bad and ses lite on. scanned ecm found code po304. checked compression , changed plug, changed coil with known good, checked coil pulse good, shecked inj. pulse ,good. did inj. drop test 14 #. should run like a dream but doesn't, pleas...
February 19, 2009
2000 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCDL19WXY
P0304: Cylinder 4 Misfire Detected. Hello to all, this is my first time using this so bear with me. i have this astro that keep throwing missfire codes on cylinders 3 and 4. after clearing codes the missfire comes back on cylinder 3 then clear them again and the new code is for cylinder 4 only. ...
February 20, 2009
2000 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA5666Y
P0304: Cylinder 4 Misfire Detected. Hello everyone. We have a Acura 3.2TL that came in with a flashing MIL light and a misfire on almost every cylinder. We removed the intake manifolds and cleaned the clogged EGR ports but the misfire is still present. We checked compression- good. We can not ho...
February 24, 2009
1996 Audi A4 2.8L Misfire, MIL Lamp on VIN: WAUEA88D6T
P0304: misfire4. Vehicle comes in with a check engine light, Retrieved Dtc 302, 304, 300, Cleared codes test drive. During test drive after shifting from 2nd to 3rd and 3rd to 4th you could feel a hesitation or such that it felt like a bad sparkplug or wire. Spark plugs were r...
February 27, 2009
2002 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWPD63B62
P0304: cyl 4 misfire. CAME IN FIRST TIME FOR P0304, REPLACED ALL PLUGS AND # 4 COIL. ROAD TESTED AND ALL WAS FINE. CUSTOMER TOOK CAR, NEXT MORNING CAME BACK WITH CYL #3 MISFIRE, REPLACED #3 COIL, ROAD TESTED, ALL GOOD. CAME BACK A FEW DAYS LATER AND HAD CODE FOR#2 CYL MISFIRE, REPL...
February 27, 2009