: ticking throttle



jgreen
07-25-06, 10:09 PM
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?
Thanks

CadiJeff
07-25-06, 10:17 PM
I think the 95 still has an idle speed control motor, try searching for that or "ISC motor"

Ranger
07-26-06, 12:13 AM
ISC motor is failing.

davesdeville
07-26-06, 02:17 AM
Mine's been doing that for about a year and a half now. ISC hasn't gone out on me yet...

codewize
07-26-06, 09:30 AM
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.

CadiJeff
07-28-06, 12:02 AM
$200?!?! not US dollars you suouldn't pay more than $100 at any parts source got an oem last year from dealer for $78.

codewize
07-28-06, 11:16 AM
Really? I think the dealer charged me $180 for my 89 STS.


$200?!?! not US dollars you suouldn't pay more than $100 at any parts source got an oem last year from dealer for $78.

jgreen
07-30-06, 11:18 PM
Thanks for all the help guys. You're right on the money. It was the ISC motor. $65.00 at Rock Auto, on line.

codewize
07-31-06, 11:25 AM
Sweet. I guess I paid top dollar from the dealer. Maybe that was installed? It's been a whiel so I don't really remember.


Thanks for all the help guys. You're right on the money. It was the ISC motor. $65.00 at Rock Auto, on line.

2dedge
08-15-06, 07:46 PM
What is the procedure for calibrating?

codewize
08-17-06, 03:37 PM
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.

Look here (http://webspundesigns.com/uploads/ISCadjustment.pdf)

AND

Read this PDF

Ranger
08-17-06, 04:41 PM
Press on the plunger til it retracts. When it bottoms out, unplug it. RPM should be about 450 (maybe even stalled). Release the plunger and adjust to a .030 gap. Reinstall the electrical connector.

codewize
08-17-06, 07:48 PM
Yeah yeah, that's it. I knew it was pretty easy.