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P0303 Diagnostic Trouble Code Discussion for December 2009

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
1999 Mercedes-Benz C43 AMG 4.3L Hesitation, Misfire VIN: WDBHA33GXF
P0303: Cyl 3 Misfire. This one is giving us a headache. This vehicle when cold, will fall on its face under medium to wide open throttle and will not rev up. It will start missing when it is hesitating and turn on the check engine light showing misfires on the right bank. Once the ...
December 01, 2009
2000 Saturn SL 1.9L Poor Fuel Economy, MIL Lamp on VIN: 1G8ZH5287Y
P0303: Cylinder 3 Misfire Detected. tried "everything" plugs don't reflect rich condition forced lean by removing pcv -- engine revs to 1500 rpm's & b1s1 dips a little to .600 vdc & climbs back up short term trim is at -50 at idle with vacuum leak induced, short term trim only ...
December 07, 2009
2003 Honda Pilot EX 3.5L Misfire VIN: 2HKYF18453
P0303: Cylinder 3 Misfire Detected. This vehicle has a slight miss at idle only. Has had previous work done at another repair facility to cure this problem. Now it is at our shop and was wondering what direction I should start with to fix this problem. I know these carlines have problems with eg...
December 08, 2009
2000 Volkswagen Cabrio GL 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3VWCC21V8Y
P0303: Misfire cyl 3. I am stuck here. Engine has a bad hesitation and running very lean. if I add fuel the vacuum reading comes into spec. O2 sensors start working, and engine reves. I have tried a good used and brand new MAF sesnor. Swapped out the Fuel pressure regulator. Smoke ...
December 09, 2009
2001 Lexus IS300 3.0L Misfire VIN: JTHBD18211
P0303: Cylinder 3 Misfire Detected. Hello technicians, I had a customer bring a car to me for a smog check. After the smog check, the engine light failed, but the emission passed. In test 15 mph, the HC MEAS was 0. CO % MEAS was O.00. NO MEAS was 56ppm. In test 25 mph, HC MEAS was 0. CO was 0.00...
December 10, 2009
2001 Mazda Tribute ES 3.0L High backpressure VIN: 4F2YU09111
P0303: Cylinder 3 Misfire Detected. I'm hoping someone has run into this before and can shed some light on a difficult problem. When the vehicle originally came in, the egr valve had a hole in the side of it. We found that this was due to excessive backpressure. The convertor on bank 1 had come ...
December 11, 2009
2004 Subaru Impreza WRX STI 2.5L Stall, Misfire, MIL Lamp on VIN: JF1DG70644
P0303: Cylinder 3 Misfire Detected. this car came from subaru and they said it had drilled out injectors(-- thats right.. wow.. what a joke. this thing runs rough and stalls when coming back to an idle, but the intake cam code bothers me. customer says he hasnt had a timing belt done recently. j...
December 11, 2009
2008 BMW 335i 3.0L Poor Idle Quality, Misfire, MIL Lamp on, WHITE SMOKE, COLD VIN: WBAWB73528
P0303: cyl 3 misfire. Customer cals with "serious check engine light and car running rough and smoking". I scan and find all these lean and misfire codes, engine in safe mode(restricted boost I think)retrieve freeze frame data and clear codes. Start car, idles smooth, no sm...
December 12, 2009
2002 Subaru Forester 2.5L Misfire VIN: JF1SF63512
P0303: Cylinder 3 Misfire Detected. This one mifires randomly on every cylinder only at idle, just off idle it goes away. Replaced spark plugs and wires-no change. LT fuel trim is at -24 and upstream O2 stays at 1.5V. Replaced oxygen sensor-no change. Checked for vacuum leaks and found none.
December 14, 2009
1999 Ford Explorer XLT 4.0L Poor Idle Quality, Misfire VIN: 1FMZU34E6X
TRUCK CAME IN ROUGH IDLE AND MILL ON FOUND ALL THE CODES LISTED ABOVE AND ALSO FOUND THE VACUUM LEAK ALSO THE PASSENGER SIDE HEAD HAS LOUD KNOCKING NOISE THOUGHT WAS THE TIMING CHAIN BECAUSE FOUND THAT IT WAS LOOSE. FOUND TSB FOR CHAIN NOISE AND DID THE REPAIR...
December 15, 2009
2001 Mazda Tribute ES 3.0L High backpressure VIN: 4F2YU09111
P0303: Cylinder 3 Misfire Detected. I'm hoping someone has run into this before and can shed some light on a difficult problem. When the vehicle originally came in, the egr valve had a hole in the side of it. We found that this was due to excessive backpressure. The convertor on bank 1 had come ...
December 15, 2009
2000 Dodge Ram 1500 Truck 3.9L Misfire, MIL Lamp on VIN: 1B7HC16XXY
P0303: Cylinder 3 Misfire Detected. ... technician. He has checked the tune up, "Champion" spark plugs clean & like new. Wire set looks good, as does cap & rotor. Swapped plug to another cylinder & tried moving the injector to another cylinder, but truck continues to skip (ca...
December 16, 2009
2004 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA66274
P0303: Cylinder 3 Misfire Detected. ... checked valves and exhuasts were tight, adjusted valves and smooth idle now, but on heavy acceleration runs great but when you let off gas and resume cruise speed it will misfire and cel flashes with above codes. have tried replacing egr valve to no avail ...
December 18, 2009
2004 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA66274
P0303: Cylinder 3 Misfire Detected. ... checked valves and exhuasts were tight, adjusted valves and smooth idle now, but on heavy acceleration runs great but when you let off gas and resume cruise speed it will misfire and cel flashes with above codes. have tried replacing egr valve to no avail ...
December 18, 2009
1999 Ford Explorer XLT 4.0L Poor Idle Quality, Misfire VIN: 1FMZU34E6X
TRUCK CAME IN ROUGH IDLE AND MILL ON FOUND ALL THE CODES LISTED ABOVE AND ALSO FOUND THE VACUUM LEAK ALSO THE PASSENGER SIDE HEAD HAS LOUD KNOCKING NOISE THOUGHT WAS THE TIMING CHAIN BECAUSE FOUND THAT IT WAS LOOSE. FOUND TSB FOR CHAIN NOISE AND DID THE REPAIR...
December 19, 2009
2002 Honda CR-V LX 2.4L No Start, Misfire, Poor Fuel Economy, MIL Lamp on, Rich VIN: SHSRD68422
P0303: Cylinder 3 Misfire Detected. Hello everyone. The main problem with this vehicle is it runs very rich. So much so that when cold it will soak the spark plugs and not start. I pulled the plugs and let it sit overnight. I did the compression check and re-installed the plugs. It starts and ru...
December 22, 2009
1998 Chrysler Sebring JXi 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3C3EL55H3W
P0303: Cylinder 3 Misfire Detected. I was given car after Apprentice Tech did a Tuneup ( plugs and wires) to fix a misfire. Car has been here two weeks. I initially checked fuel pressure and found no problem it was when I tested and founf that the coil could not produce enough spark to jump a HE...
December 28, 2009
1999 Subaru Legacy Outback 2.5L Misfire, MIL Lamp on VIN: 4SG126985X
P0303: Cylinder 3 Misfire Detected. replaced timing belt, pump, all seals. upon start up, 1 and 3 on (right bank) not working at all. double checked cam timing, great spark and injector duty cycle is 3-5 milliseconds. car ran fine before timing belt work was performed. HELP! HELP! HELP! 125-130 ...
December 28, 2009
2001 Ford Focus SE 2.0L Stall, Misfire, MIL Lamp on VIN: 1FAFP33P91
P0303: Cylinder Misfire No. 3 STORED. ... idle and intermittent stalling. Checked fuel psi and ignition components all ok. No active or stored codes. All PIDS ok. Throttle body was severely dirty but since stalling never duplicated didn't want to recommend work. Customer comes back now with MIL on...
December 29, 2009
2003 Jeep Liberty Limited 3.7L Misfire, MIL Lamp on VIN: 1J4G148K53
P0303: Cylinder 3 Misfire Detected. The vehicle came to me with the number 3 coil split open with the insulation melting out of it. I replaced the spark plugs and the coil. The coil driver was also blown in the PCM so I replaced it with a used PCM. The car came back about a week later with the c...
December 29, 2009