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P0304 Diagnostic Trouble Code Discussion for September 2009

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2003 Mercedes-Benz C230 Kompressor 1.8L Hesitation, Surge, Stall VIN: WBDRN40J73
P0304: misfire 4 cyl. rough idle and stalls intermittently, short term fuel trim close to normal and when acting up short term fuel trim at +25. dont see any air leaks. i dont work on many of these cars, any help would be apperciated
September 01, 2009
2005 Ford F-150 XLT 5.4L Poor Idle Quality, lack of power VIN: 1FTPF12545
P0304: 4 miss. truck came in on tow truck, tried to start it has a raw fuel smell doesnt race up. with misfire codes in it I checked for spark, has that, noid light flashes so I pull plugs on bank one, fuel soaked so I lift injector rail #s 2-3 running fuel #s 1-4 drip. repl...
September 02, 2009
1997 Dodge Ram 1500 Truck 5.9L Poor Idle Quality, Misfire VIN: 1B7HF16Z8V
P0304: Cylinder 4 Misfire Detected. ... ram 1500 5.9l came in for a maintance about a month ago did plugs cap rotor etc. retested truck ran great. 3 weeks passed and customer call said was running poor s.e.s light on. he stop in scaned and found p0301,2,3,4,,5,6...
September 03, 2009
2003 Mercedes-Benz C230 Kompressor 1.8L Hesitation, Surge, Stall VIN: WBDRN40J73
P0304: misfire 4 cyl. rough idle and stalls intermittently, short term fuel trim close to normal and when acting up short term fuel trim at +25. dont see any air leaks. i dont work on many of these cars, any help would be apperciated
September 03, 2009
2001 Ford F-150 Lariat 5.4L Misfire, MIL Lamp on VIN: 1FTRW08L91
P0304: 4 cyl. misfire. ... on code p0304 i replaced #4 coil and plug, did not fix. checked injector with noid, ok. checked coil primary have 12v. but no neg trig. i want to run new wiring harness from ecu to #4 coil. i did not renew all data so i do not have wiring diagram. can some...
September 06, 2009
1999 Land Rover Discovery SD 4.0L MIL Lamp on VIN: SALJY1249X
P0304: Misfire Detected - Cyl 4. Dealership trade in. Found oxygen sensor registering full rich bank one and full lean bank 2, switched harness from bank 1 to bank 2 and vice versa. Mixture returned to normal. Vehicle runs very smooth and has all the power to be expected. From time to time th...
September 08, 2009
1999 Chevrolet Malibu 3.1L Misfire, MIL Lamp on VIN: 1G1ND52J1X
P0304: Cylinder 4 Misfire Detected. ... lower intake manifold gasket replaced due to coolant leak (can you imagine). I gave him estimate and he went elsewhere to have repair done. Now the fun starts. Misfiring since the job was completed. They (the other shop)installed a used fuel rail with used...
September 10, 2009
1999 Plymouth Neon High Line 2.0L Misfire, MIL Lamp on VIN: 3P3ES42Y7X
P0304: Cylinder 4 Misfire Detected. Dear chrysler techs, Got this neon here that has an intermittant misfire, showing up as cylinder number 4. It acts like an ignition miss. Plugs had been in car for a while, replaced. No change. Checked wires--checked ok. I did have a known good set of wires--s...
September 10, 2009
1998 Honda Accord LX 3.0L MIL Lamp on VIN: 1HGCG164XW
P0304: Cylinder 4 Misfire Detected. I have misfire codes P0300 thru P0306. Customer had no complaints. Car runs excellent. Ignition parts are not new but they look OK. I cleared the codes and tried to reset the codes but couldn't. Freeze frame data: rpm - 5700 RPM, VEH SPEED - 52 MPH, LTFT - 2.0...
September 14, 2009
2000 Honda S2000 2.0L Poor Idle Quality, MIL Lamp on VIN: JHMAP1144Y
P0304: Cylinder 4 Misfire Detected. ... misfire on cylinder #1,at that time the check engine light was on,(misfire on cyl.#1),so i changed all sparkplugs and ignition coil on cyl.#1.Two weeks later,tha car comes back with the check engine ligth on,The codes were P0302,P0303,P0304,so after doing ...
September 14, 2009
2005 Audi A4 Quattro 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WAULC68E15
P0304: misfire 4 cyl. runs very rough and mil flashes at idle. runs fine with foot on brake and in gear if rpm is above 1100 rpm. MAF reads higher than alldata says it should at idle. checked power, ground and 5 volt ref. all ok. Replaced MAF with new bosch from aftermarket suppli...
September 15, 2009
2002 Volkswagen Golf GL 2.0L Misfire VIN: 9BWGK61J92
P0304: cylinder 4 misfire. thank you all in advance. this v/w is kicking my butt. came in with cyl#4 misfire. we replaced plugs , installed new oe. wires & coil(all original). the car still ran bad, but now misfire went to cyl#1. got another plug for cyl#1. test drove & misfire ...
September 15, 2009
2000 Honda S2000 2.0L Poor Idle Quality, MIL Lamp on VIN: JHMAP1144Y
P0304: Cylinder 4 Misfire Detected. ... misfire on cylinder #1,at that time the check engine light was on,(misfire on cyl.#1),so i changed all sparkplugs and ignition coil on cyl.#1.Two weeks later,tha car comes back with the check engine ligth on,The codes were P0302,P0303,P0304,so after doing ...
September 18, 2009
2004 Mercury Monterey (Van) 4.2L Misfire, MIL Lamp on VIN: 2MRZA20224
Hi All,This vehicle vame in with new coil,plugs,wires,fuel filter,EGR valve and DPFE sensor.Vehicle still misses intermittently but does not store codes immediately.Checked all previous repairs and found all satisfactory.Misses stronger at highway speed.At 120...
September 18, 2009
1999 Plymouth Neon High Line 2.0L Misfire, MIL Lamp on VIN: 3P3ES42Y7X
P0304: Cylinder 4 Misfire Detected. Dear chrysler techs, Got this neon here that has an intermittant misfire, showing up as cylinder number 4. It acts like an ignition miss. Plugs had been in car for a while, replaced. No change. Checked wires--checked ok. I did have a known good set of wires--s...
September 22, 2009
1998 Chrysler Cirrus LXi 2.5L Cuts out, Misfire, MIL Lamp on VIN: 1C3EJ56H4W
P0304: Cylinder 4 Misfire Detected. probelm intermittent-replaced ASD relay. Customer states that when issue occurs that cruise control light is on. any suggestions appreciated
September 24, 2009
2002 Mercedes-Benz ML320 3.2L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 4JGAB54E12
P0304: misfire cylinder 4. Hello all you mercedes techs out there, this one is killing us. We have changed everythign and still the same codes are popping up, sorry it's been a long day and I don't feel like going to my other dest to get the benz codes so I just entered the odb11 codes ...
September 24, 2009
2000 Ford Ranger XL 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTZR15X8Y
P0304: cylinder 4 misfire. This vehicle has a misfire on cold start ups for about 1-2 minutes depending on its "mood". I have done a tune up on it in the last 6 months just as maintanance. Fuel pressure is within spec koeo or koer. The spark plug always gets an area thats darker...
September 25, 2009
2001 Chevrolet S10 LS 4.3L Misfire, MIL Lamp on, misfire 1&4 cyl p300 VIN: 1GCCS19W61
P0304: Cylinder 4 Misfire Detected. truck was towed in with blown engine,replaced with low mile used engine.resealed and tuned.ran great after replacement was completed.truck returned 2weeks later for fuel level sensor repair.thats when we found the misfire codes.no complaint from customer, high...
September 30, 2009
2005 Volkswagen Golf TDI 1.9L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 9BWGR61J25
P0304: 4 cyl missfire vag16688. Good Morning VW Techs! This vehicle is my other hanger queen. The vehicle was brought back on a trailer after stranding the customer 100 miles out on a 200 mle trip. The vehicle stopped running after smoking and the engine noise increasing. The exhaust is full...
September 30, 2009