2002 GMC Envoy "high idle cause" Questions

idle isn't an intermittent misfire type, but a vibrating high frequency type. 2002 Envoy 4.2L with new plugs and K&N air filter. No check engine light has come on. Any help would be appreciated! check

idle or high idle. ( idle air control ). the p0410 is a seperate issue. have a good one !! just let me know the outcome ok. You don't sound like a novice. Take it to a shop - not a dealer and tell

...high octane gas. A common cause for stalling at idle is a "throttlebody" plugged with carbon. A simple De-Carbon service that cleans the carbon from the throttle plate and the IAC valve will almost ...

...idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 ...

...high idle I have a 2002 GMC Envoy that has had several problems in the past three months. I?ll be at a stop light and the RPM jumps up to 1200 then down to 400 then up to 1000 then down to 200 and ...

...idle for an extended period or bumper to bumper traffic exists my ac temp will go up, not as cold. I've been told the radiator is not the correct size for the vehicle. My Envoy XL has a V8 5.3L. This ...

high and it shuts off after I am sitting at a light(traffic). My trottle body was cleaned, reset & idle relearn. Can you please help me! Thank you ck engine and see if there is any black hoses off

...idle high while driving sounding like a school bus...I was told it's the cylinder fan and now it's starts to make this squeaking noise which I too was told that was my serpentine belt... Your engine ...

...high constantly. No normal idle like before. I however, did not replace the fan clutch. My question is... would me not changing the fan clutch be causing the idling problems? Sounds like you may have ...

...high mileage vehicle is replaced and/or reprogrammed without performing the Throttle/Idle Learn procedure, the ECM/PCM may no longer compensate for existing carbon build up in the throttle body, ...