jgk62

Here's my problem. My 951 starts and idles fine until after about 15 minutes of 'normal' driving when all of a sudden the idle shoots up to between 2300 and 3000 rpm and stays there.
Sometimes i can quickly kick the gas pedal and it'll come down for a little while.
I was thinking it was a vacuum leak but now i think it might be the TPS.
What are your thoughts?

Thanks in advance!

ahofam123

A quick and easy way to test the tps would be to open the throttle and close it again while standing above the tps. Once the throttle closes, the tps should click. There should be some slack in the throttle cable to allow the throttle to close completely.

jgk62

Thanks for your quick response.
Yes, i've done the 'click' test and everything is as it should be.

Jeff928S4

Vacuum leak??? Idle Stabilizer Valve stuck???

944S Boyeee

slevy951

Sounds like your idle stabilizer is sticking.......

pete944

It sounds like an air leak before the AFM. Look for a loose clamp on the big rubber air intake hose.