My 89 used to start--without touching the pedal, fast and idle about 1500 until coolant warmed up and the drop to idle around 750----normal
But now it doesn't do that. I changed the coolant sensor, new idle valve (Motor craft) ignition control module,--TPS, Now I have to tap the pedal to get it to idle as start up it drops to around 4-5 hundred rpm.
I put an OBD 1 on it and it didn't show anything except thermactor left side---I don't think that has anything to do with it as it all worked fine until I had the transmission overhauled-- It worked even then so I don't think that had anything to do with it as they put a new throttle cable in----it worked but all of a sudden now it doesn't have that great start up like it used to.
What could it be-? I don't want to adjust the throttle plate idle, as it would give me a higher idle. I checked for vacuum leaks as it seemed to need more air. Couldn't find any vacuum leaks, I disconnected the battery , negative, as maybe the computer needed be be re-set----didn't help. New fuel pump--had 35psi steady---even tried to do the ignition twice before start--thinking maybe not getting enough fuel--no help ?
Is there maybe an adjustment at the pedal-?? maybe coolant sensor ,even new, is bad-? Once it starts it runs great--when hot fires right up. I'm perplexed--! Sam
But now it doesn't do that. I changed the coolant sensor, new idle valve (Motor craft) ignition control module,--TPS, Now I have to tap the pedal to get it to idle as start up it drops to around 4-5 hundred rpm.
I put an OBD 1 on it and it didn't show anything except thermactor left side---I don't think that has anything to do with it as it all worked fine until I had the transmission overhauled-- It worked even then so I don't think that had anything to do with it as they put a new throttle cable in----it worked but all of a sudden now it doesn't have that great start up like it used to.
What could it be-? I don't want to adjust the throttle plate idle, as it would give me a higher idle. I checked for vacuum leaks as it seemed to need more air. Couldn't find any vacuum leaks, I disconnected the battery , negative, as maybe the computer needed be be re-set----didn't help. New fuel pump--had 35psi steady---even tried to do the ignition twice before start--thinking maybe not getting enough fuel--no help ?
Is there maybe an adjustment at the pedal-?? maybe coolant sensor ,even new, is bad-? Once it starts it runs great--when hot fires right up. I'm perplexed--! Sam