Original computer is 56027141 Motor swap was from California. Dont know number. Didnt change anything on intake. Throttle body egr everything look same and matched up with harness. Did put in remanufactured injectors. Also used distributer and halls, and crank sensor form other motor cause they were new. Have also bought newupstreem 02 sensor. Thats the only one it has. Am currently trying to locate original computer for this motor but dont know if I can use it, if it requires a downstreem o2 sensor that I dont have. What do I have to change to use this engine with my computer # 7141? Eversince I put this motor in I have had a misfire that started out casual goin down the hiway, you would feel the truck jerk now and then. It would idle fine and run out fine with no misses. Has since gotten so bad you cant drive it. Sometimes it will idle fine, sometimes it wants to die till warmed up. But when you drive it when you give a certain amount of gas
it backfires out the exhaust like its 180 degrees off, pops and jerks violently, push the gas alittle further it instantly I mean instantly clears up. Cant stay a constant speed or it backfires but if you acellerated itcomes right out of till you level off then comes right back. Change tps Pretty much been through everything but computer.
Never has had check engine light on Code skips 88 start test code goes straight to 12 code the end code 55 May have messed up computer jumping to get started at first had to crank it alot. Ordered new 7141 computer do I need to change anything else on this motor to make it work. Hope the problem doesnt lie in timing or valves but is confusing how well it runs when it idles for the most part and runs flawless when your on it, just seems to really get its signals mixed up between 2 and 3 grand mabey certain throttle positions or any time you try to level off. This is a low mile motor but sat around awhile. What do I need to change to make this motor compatable with my computer?
Sunday, February 22nd, 2009 AT 1:20 PM