Questions & Answers for: GMC Sierra high idle

...HIGH IDLE 1998 GMC SILVERADO FIXED AND REPLACED EVERYTHING BUT TRUCK WILL STILL IDLE HIGH have you replaced your intake gaskets? this is a problem on these trucks with high milage. to see if your ...

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Question about 1994 Sierra

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engine idle high when taking off not sure what you are asking the truck should idle high on take off.

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...so high I can take off from stop without applying gas. Will not go uphill, bogs out and wants to stall. Does not idle fast in park. No engine lights on. idle my be offset or a hose my be off as ...

high idle and the computer hasnt thrown a code. How do I fix this or what all could it be? I also hhave a sunpro tach and dont know what to hook it up to....? if u own a 1989 sierra u dont have an obd

Question about 1993 Sierra

1 Answer

...a TPS sensor. My truck seems to be idling high as well. Any other suggestions? I Code 35 is for the Idle Air Control valve, which will make it it idle high, if defective. The TP sensor should be

Question about 2000 Sierra

1 Answer

...idle high as soon as i start it. when it is idleing high the trans. does not shift when it normally does it shifts at a lot higher rpm than normal and shifts hard like it has a shift kit in it. any ...

...high idle emissions. Emission numbers were 10-20x max legal limit (over 3000). Replaced the catalytic converter and EGR valve and cleaned the idle air valve and took back to emissions. Truck passed ...

Question about 1994 Sierra

1 Answer

high idle possibly causing internal engine damage and safety issues. • Designed to meet or exceed OE specifications in form, fit and function. • Global coverage for import and/or domestic applications

high idle and strong suction on oil filler cap High idle usually indicates a vacuum leak, you may have one of the smog hoses disconnected, that would also cause a suction at the filler cap because the

Question about 1990 Sierra

1 Answer

...high idle issue with sometimes a backfire. I have changed the map and coolant temp switch and that has helped it seems. but still idles too high and when driving, it won't idle down (with the ...

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