Northstar Engines and System Technical Discussion Discussion, ticking throttle in Cadillac Engine Technical Discussion; I don't know if this has been addressed before, but I'm stumped. Sometimes(not all) when I shut off the engine ...
I don't know if this has been addressed before, but I'm stumped. Sometimes(not all) when I shut off the engine in my 95 Seville the throttle cable will click several times. I can see it happening.
No codes are set. The TP sensor at idle is .78V, throttle angle is 4 to 5 degrees. Could I have a hung up ISC valve?
Can anyone suggest possible causes?
Yup for sure ISC. It's the little thing that look like a solenoid that the throttle rests on mounted to the throttle body. It has a threaded rod that pushes out to maintain idle if the idle drops and to produce the step up idle during cold starts.
If you replace this your self there is a sequence you must perform to calibrate it. You can't just take old off and put new on. Also note that this part will cost you around $200, if I remember correctly.
Both of you should be careful with this. I had mine one day all of a sudden throw WOT while I was decelerating coming into a city road. I also knew it was bad and kept letting it go. Get it fixed. You'll save a lot of gas and it'll be safer.
Ouch, I'll have to look. It's something like at idle you push the rod back into the unit as far as it will go then you unplug it at that point. Then you turn the end in or out to get the idle to 500 RPM. They you plug it back in.
I wouldn't trust this info until I or someone verifies it. But it's something to that effect.