Engine does not idle down when throttle let off POSSIBLY FIXED
- Thread starter bender
- Start date
killerrudy
New member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
I just had to change mine. The threads on the screw had stripped out. But my truck was stumbling when taking off from a dead stop. Not the same as yours.
Re: Engine does not idle down when throttle let off
I just had to change mine. The threads on the screw had stripped out. But my truck was stumbling when taking off from a dead stop. Not the same as yours.
WyoSyclone
Active member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
Sounds like the torque converter not unlocking
Re: Engine does not idle down when throttle let off
Sounds like the torque converter not unlocking
bender
Member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
That was another thought of mine. The other night after installing the new IC pump, when I put in in reverse, it died. I started it again and same thing happened. I gave it a little gas the third time and then it acted perfectly fine.
I think there may have one time been a TC lockup switch in the truck. There is a fair bit of non factory wiring under the dash, and I am not sure how I would undo it if it was stuck on.
Re: Engine does not idle down when throttle let off
That was another thought of mine. The other night after installing the new IC pump, when I put in in reverse, it died. I started it again and same thing happened. I gave it a little gas the third time and then it acted perfectly fine.
I think there may have one time been a TC lockup switch in the truck. There is a fair bit of non factory wiring under the dash, and I am not sure how I would undo it if it was stuck on.
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
Sounds like IAC problem to me. Try pulling it out and clean it and the port it resides in. My TPI car acted like this, it got better with cleaning but ended up having to replace it shortly after to solve the problem.
Re: Engine does not idle down when throttle let off
Sounds like IAC problem to me. Try pulling it out and clean it and the port it resides in. My TPI car acted like this, it got better with cleaning but ended up having to replace it shortly after to solve the problem.
bender
Member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
I have always had a bit of a hesitation when taking off from a stop. It studders for half a second then goes fine. Not an issue if im holding the brakes and accelerating, just from a stop and normal acceleration.
Re: Engine does not idle down when throttle let off
I have always had a bit of a hesitation when taking off from a stop. It studders for half a second then goes fine. Not an issue if im holding the brakes and accelerating, just from a stop and normal acceleration.
bender
Member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
I went and did a run around the block. Here is the datamaster file if anyone can look at it.
It appears TC is locking and unlocking as it should, but idle issue is still there. I also noticed when I let off the throttle in cruise, RPM dives then jumps back up.
9-29 test.uni
Re: Engine does not idle down when throttle let off
I went and did a run around the block. Here is the datamaster file if anyone can look at it.
It appears TC is locking and unlocking as it should, but idle issue is still there. I also noticed when I let off the throttle in cruise, RPM dives then jumps back up.
9-29 test.uni
bender
Member
Re: Engine does not idle down when throttle let off
Re: Engine does not idle down when throttle let off
I believe I have found the problem to multiple issues. I could not get 100% tps without bending the pedal or shimming the cable. But then I had issues with throttle sticking. Then the problem of not idleing down started. Today I found this.
I ordered a new cable and will see what happens.
Re: Engine does not idle down when throttle let off
I believe I have found the problem to multiple issues. I could not get 100% tps without bending the pedal or shimming the cable. But then I had issues with throttle sticking. Then the problem of not idleing down started. Today I found this.
I ordered a new cable and will see what happens.