I have a 87 7me an I have jus installed another motor in it. It runs great as lomg as it idile but once you hit the gas it revs then drops off then revs then drops off. I have checked rotor, cap, fuel pump, fuel filter, plugs, wires, timing, but all to no avile. It use to start with the key but now there is no power from the key to the start so i an havin to us a jumper wire to start the car but once runnin it idl fine but still can't get car to drive without the crazy surge thing goin on . PLEASE help!!!
losing my mind help
- Thread starter supraflydaddy45
- Start date
You didn't say what rpms it revs to or whether it does that even with the pedal held to the floor but try this: with the engine off enter diag mode and with the tranny in Park (if an auto) and AC off press the accelerator. Get a 51? If not there's your answer. Another way is to simply unplug the TPS and see if the surging disappears. If it does your problem won't be hard to resolve.
it rev's to about 1500 to 2500 then starts the surge thing an its a 5speed. Yes to does it if i hold it to the floor
Well, it sounds like fuel cut. It's caused by the IDL contact remaining closed while airflow and rpm increase. The ECU doesn't approve of this illogical situation and shuts injection off until rpm falls to a safer level. Try the tests I said to confirm.
chrisisg77;1883738 said:Wow jj youre actually helping someone? I liked the old you better
He always helps, Its up to the helped to listen.
Yea i know he does i was just saying that because i havent heard any of his sarcastic remarks in a while.
Two in a rowchrisisg77;1883738 said:Wow jj youre actually helping someone
http://www.supramania.com/forums/showthread.php?166489-Weird-Surging-Idle