Misfire help
I have searched through the forums and need some advice. Getting misfires, pulled codes a few weeks ago;
16805 - Warm Up Catalyst: Bank 1: Efficiency Below Threshold P0421 - 35-00 - - 16684 - Random/Multiple Cylinder Misfire Detected P0300 - 35-00 - Please Register/Activate 16689 - Cylinder 5: Misfire Detected P0305 - 35-00 - Please Register/Activate 16687 - Cylinder 3: Misfire Detected P0303 - 35-00 - Please Register/Activate 16690 - Shareware Version. To Decode all DTCs P0306 - 35-00 - Please Register/Activate 16686 - Shareware Version. To Decode all DTCs P0302 - 35-00 - Please Register/Activate Did some research, cleared codes and ran for a day..Codes below. 16684 - Random/Multiple Cylinder Misfire Detected P0300 - 35-00 - - 16690 - Shareware Version. To Decode all DTCs P0306 - 35-00 - Please Register/Activate 16687 - Shareware Version. To Decode all DTCs P0303 - 35-00 - Please Register/Activate Switched ignition coil to 5 and 2, misfires followed. Replaced ignition coils and car ran perfect for a few hours then started to misfire again under full throttle or load. Car runs better than before but still misfires under load or full throttle. Runs smooth most times when acccelerating lightly. 4 Faults Found: 16684 - Random/Multiple Cylinder Misfire Detected P0300 - 35-00 - - 16689 - Shareware Version. To Decode all DTCs P0305 - 35-00 - Please Register/Activate 16686 - Shareware Version. To Decode all DTCs P0302 - 35-00 - Please Register/Activate 16690 - Shareware Version. To Decode all DTCs P0306 - 35-00 - Please Register/Activate Readiness: 0000 0001 Since the misfires are not limited to one bank I guess the controller is not the cause. Mass air flow sensor? |
when was the last time you replaced the spark plugs, and if so did you use good ones?
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Originally Posted by rs4tech
(Post 23935546)
when was the last time you replaced the spark plugs, and if so did you use good ones?
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most likely spark plugs, use oem...
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