skinny Posted May 13, 2012 Report Share Posted May 13, 2012 ok I have a 97 f150 that was running ok. I parked it at a creek to fih when I was ready to leave it backfired. ever since it runs like its out of time popping and snaping. i had my neighbor over with his scan tool it gave no real codes to help I have swapped out coil packs and also the mass air sensor with no change looking for pointers or ideas I would check the timing chain but it looks lke alot of work anyone have a simple way to check it could really use some ideas need to drive to work in morn Link to comment Share on other sites More sharing options...
ecmilley Posted May 13, 2012 Report Share Posted May 13, 2012 without being there myself to look it over it's hard to say, try putting a vacuum guage on it a jumped chain will give you a low steady reading. when is it popping? idle acceleration cruising my expierence with the fords is when no codes are showing up and performance issues arise good chance you plugged up a catalytic convertor Link to comment Share on other sites More sharing options...
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