thedogss Posted January 20, 2018 Report Share Posted January 20, 2018 can anyone help me please I have a 2006 3.3 Chrysler which is showing a misfire on 1 and 3 it has LPG which was fitted 5 years ago ive owned it for about a year , so it started with the engine management light coming on and showing code po300,po301 and po303 so after looking up codes its misfiring on 1 and 3 so and change the plugs turns lights out and the same thing happens a few days later so now I change the leads and then same thing happens next I change the coil , same thing happens I then have the gas system serviced and again a few days later the same thing happens , it runs fine just a little lumpy on tick over if anyone can help with this would be great . Quote Link to comment Share on other sites More sharing options...
mikebh8 Posted January 29, 2018 Report Share Posted January 29, 2018 . Quote Link to comment Share on other sites More sharing options...
Dansail Posted February 4, 2018 Report Share Posted February 4, 2018 Is this only at startup? I have a 10s misfireing at cilinder 1 (3.8) at cold start and after that all is well. Seems like spark plug in my case. But have you checked oil pressure and air and fuel intake? Quote Link to comment Share on other sites More sharing options...
PJS Posted February 4, 2018 Report Share Posted February 4, 2018 HAD THE SAME PROBLEM PETROL INGECTOTS LETING BY.GOT USED ONES OF EBAY AND RAN PERFECT. Quote Link to comment Share on other sites More sharing options...
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