Questions & Answers for: GMC idling fast

idle too fast The idle in my 1996 gmc safari van is way too fast. When it began I would have to wait about a minute to put it in gear,now it idles even faster and does'nt go away the throttle body ...

mot failure emmisions my car is emmiting blue smoke from exhaust and failed mot on emmisions does anyone know the likely cause?Failed on carbon monoxide content at idle excessive,2nd fast idle ...

...idling too fast usually it's due to a vacuum leak or other problem that over powers the computers ability to lower the idle speed to what it was programed to idle at. If the check engine light is on ...

fast idle Fast idle could be the result of a few things; however, I would start with your Idle Air Control (IAC) Value. This is is mounted on your car's throttle body and it controls your vevicles ...

1995 gmc sierra 1500 automatic transmission idles fast, and late shifts Do you have a service engine light on? If so the first thing to do would be to check for what codes may be stored. You can also ...

Fast idle 90 GMC Sierra I have a 1990 GMC Sierra, 5.7L 4x4. I have a fast idle problem. I have replaced the TPS, IACV, Throttle body gasket, Temp switch, can hear no hissing. I recently replaced the ...

changed Air Control IAC valve. did not fix fast idle problem Have problem with fast idle on 1994 sonoma gmc pickup. tried idle position senser and IAC valve with no results sounds like a vacume leak ...

I have a 1986 GMC 1500 with a 5.0 and stock rochester carb. The truck will start but you must keep gassing it as it won't idle. It kicks off every time. Any suggestions on how to fix this cold natured

1988 gmc sierra 1500 engine idles too fast. just installed a kit on rochester throttle body. just installed a kit on a Rochester throttle body 2 point fuel injection and the engine idles too fast. 5.7

...idling, in park or drive the engine has a cyclical engine surge. The surge rpm is equal to fast idle. The repeating cycle is 10 seconds normal idle, and 2 seconds surge to fast idle then back to ...