Fast Idle, drives without touching gas pedal

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Dimes

Re: Fast Idle, drives without touching gas pedal

Unread post by Dimes » Sun Mar 28, 2010 11:25 am

I also forgot to mention that my cruise control isn't working properly. It will allow me to set it and it works, but if i hit the accelerate switch on the turn signal it decelerates. Prior to replacing the MAF sensor i do remember that the acceleration side worked. An employee at the local auto part shop seems to think it could have something to do with it?

Kimberly

Re: Fast Idle, drives without touching gas pedal

Unread post by Kimberly » Mon Jun 20, 2016 10:13 am

I have a 2003 Pontiac Montana minivan, idles extremely high and accelerates without even touching gas pedal. HELP PLEASE. I've replaced the idle control switch, which I was told was the problem but found out it wasn't. Tia

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carriedi
Posts: 2573
Joined: Wed Apr 10, 2013 12:42 pm

Re: Fast Idle, drives without touching gas pedal

Unread post by carriedi » Tue Jun 21, 2016 1:02 am

First thing I would look at for high idle is a vacuum leak. Scanning the engine to look at the IAC (idle air control) and looking at the fuel trims to see if the computer is adding fuel or taking fuel away.

with a scanner you should be able to go ina and control the IAC and tell the idle to move up and down. That would tell you is your IAC was working with the computer commands.
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