850Turbo 1995 Racing RPM s

[email protected] · Post by **[email protected]** » 14 Jun 2004, 14:35

I have an 850Turbo 1995 that is racing rpm's intermmittently. From 2000-3000rpms. it begins and ends randomly and seems to be worst with the AC on but not eclusive to that. The thermometer has been changed and it helped for a week. Mornings are exciting with my foot hard on the brake at the light and looks to accept my race challenge. I'm pretty certain I am the reason for the high cost of gasoline...supply nad demand you know.
Help anyone?

Post by **matthew1** » 14 Jun 2004, 14:43

Causes of this can include gunked up intake manifold (use a spray degunker from an auto parts store), vacuum hose cracks or holes (small white hoses running here and there in the engine compartment), misaligned throttle cable, or a bad mass airflow sensor.

I'm sure there's more... those are what I'd look for first.

CSBRIAN · Post by **CSBRIAN** » 15 Jun 2004, 11:08

Sounds like a vacuum leak. Have you checked the hoses around the EGR valve and sensor? I found in my 94 turbo that I was blowing the line off when on boost. Could be a throttle positioning sensor which changes the postion of your throttle when the AC is on.

Check the codes to see what they read.

Brian

potroast · Post by **potroast** » 15 Jun 2004, 18:44

I don't think the TPS changes the throttle position when on AC... Isn't that the job of the IAC?