× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0303 Diagnostic Trouble Code Discussion for May 2007

Cylinder 3 Misfire Detected

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2000 Toyota 4Runner Limited 3.4L Misfire VIN: JT3GN87R4Y
P0303: Cylinder 3 Misfire Detected. Need some ideals please. This vehicle came back after we replace waterpump & timing belt. At the same time we replace plugs (NGK),the three wires,fuel filter & cleaned throttle body. Now we have po300 & po303. Freeze frame showed 300 & 303 to o...
May 01, 2007
2001 Mazda MPV DX 2.5L Misfire, MIL Lamp on VIN: JM3LW28G01
P0303: Cylinder 3 Misfire Detected. ok so heres the problem, performed 60 tune-up and replaced plugs, also found #3 plug wire with high resistance. Heres the problem every parts house including mazda dealer is sending me ford style wires (where theres a locking ring that holds the wire to the co...
May 07, 2007
2000 Ford E-150 Econoline 4.2L Misfire VIN: 1FDRE1422Y
P0303: cyl 3 missfire. customer brought in with new plugs and wires, but missfiring, and code 303 for cyl 3 missfire. if i disconnect the egr vacuum line, problem goes away, plug back in missfire comes right back. is this a plugged egr port problem? customer tried coil pack with no ...
May 08, 2007
1999 Cadillac Catera 3.0L Surge VIN: W06VR52R3X
P0303: Cylinder 3 Misfire Detected. tested relay and fuse, jumped relay works fine. disconnected vacumm solenoid, verified vacumm and air flow. Jumped relay again and verified air flow to engine by 02 stats. snap-on mt2500 no ability to activate from scanner. Intermittently hear sec AIR motor ru...
May 10, 2007
2002 Kia Sedona LX 3.5L Misfire, MIL Lamp on VIN: KNDU131126
P0303: Cylinder 3 Misfire Detected. vehicle came in with ck engine light and misfire, ck codes had po305 po303 misfire coming and going at first now missing all time at idle replaced plugs wires and #2 ign coil witch fires# 5 plug flow tested injectors all tested ok injector ohm test tested 12.5...
May 14, 2007
1998 Subaru Legacy Outback 2.5L Misfire, MIL Lamp on VIN: 4S3BG6851W
P0303: Cylinder 3 Misfire Detected. We replaced the short block (from dealer) about 6 mo. ago and cleaned heads and set valve clearance. Customer says check engine light has been on for a month with misfires on all cylinders. We cleared the codes and test drove. Engine misses at freeway speed un...
May 19, 2007
2001 Volkswagen Beetle GLS 1.8L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 3VWED21C81
P0303: missfire 1. This came in with the MIL on and has a severe hesitation on a normal or hard acceleration. It had misfire codes so we tuned it up. No improvement. It also has a code for the turbo bypass valve so we tried another. It still hesitates and sets the code the first...
May 19, 2007
2002 Volkswagen Cabrio GLS 2.0L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3VWCC21V12
P0303: 3 misfire. Vehicle came in with cel on and running so badly vehicle would hardly move. Cleared all codes, and vehicle ran better but seems to have a lack of power. When service manager tried to drive overnight, it only went about 4 miles when a cel came on and started fl...
May 22, 2007
2001 Acura MDX 3.5L Misfire VIN: 2HYD18651H
P0303: Cylinder 3 Misfire Detected. i am pulling my hair out on this car. the only thing that i have noticed lately is in freeze frame occasionally stft1 was record at 12% can not get it to do that when i am monitoring it. i do not every fell the engine misfire went the cel comes on. and sometim...
May 24, 2007
2004 Honda Accord EX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCM81794
P0303: Cylinder 3 Misfire Detected. Don't want to shoot from the hip on this one. There is obviously something common to all cylinders causing this rough idle. I have spent a lot of time looking at data, and cannot find anything out of the ordinary. This car seems to drive perfectly fine, smooth...
May 30, 2007
1998 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR52R9W
P0303: Cylinder 3 Misfire Detected. missfire codes #1#2#3. also, codes had been cleared recently. changed plugs which had oil on them due to leaky valve cover gaskets (cust. does not want to spend $ to replace gaskets) cleared codes and still miss and light on immediatly. checked codes, got miss...
May 31, 2007