My TPS is about a year old, set to spec on my 88 4.0 AW4. As of yesterday, I have an intermittent high idle problem, at startup, warm or cold. I took out my IAC and cleaned it, it is also a year old, and when I cleaned it, I cant carefully pull or push on the plunger...it seems stuck, but is that normal???
And I also read that when the TPS "arm" is pushed while at idle, it will stumble the engine.
When the idle is normal, I can push the arm and the idle will stumble.
BUT when the idle is high (2500) I can push the arm, and the idle will not stumble, it will continue to stay at 2500.
Also when the idle is normal at startup, after a few minutes of driving the idle will go to about 1200rpm.
Grounds by dipstick are clean and not broken, no vacuum lines disconnected, any help would be great.
And I also read that when the TPS "arm" is pushed while at idle, it will stumble the engine.
When the idle is normal, I can push the arm and the idle will stumble.
BUT when the idle is high (2500) I can push the arm, and the idle will not stumble, it will continue to stay at 2500.
Also when the idle is normal at startup, after a few minutes of driving the idle will go to about 1200rpm.
Grounds by dipstick are clean and not broken, no vacuum lines disconnected, any help would be great.