97 f150 4.2 help
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Joined: Jan 2017
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97 f150 4.2 help
Hey guys new here so heres what happens went out mudding and got water in my intake drove home bofinf out took the intake out put a new one in it and it fired right up but because of the amount of crud in there i decided to take it all apart down to the throttle bodie cleaned everything and it shot a maf code replaced it and it would start and it didnt want to idle but drove ok ish so i parked it and the next morning i came out to drive it and it was dead so i got my buddy to hook up the battery while i turned it over turns out the battery pack was hooked up backwards now its shooting a pile of codes most say out of self test range i put in another pcm out of a 2wd auto truck mines stick and its still doing the same thing plus a bunch of tranny codes for the torque converter are these pcms compatable and does anyone have any ide what could be wrong has plenty of compresion and spark
Cross-Country
Joined: Nov 2010
Posts: 58
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got to do one thing at a time
If it were me I'd go to back to the original PCM. THEN check for spark (get one of them spark checking lites, also a fuel pressure guage), THEN check fuel pressure. If all that shows good and still don't start then buy a Haynes book. I'm not good at these EFI things but, I did get a U-pullit wrecking yard engine swap out to run pretty well. bjr
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