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1994 Sierra Idle Problem

cb4hunter

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cb4hunter New Member

cb4hunter

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hello i have a 1994 sierra when it i in park the rpm is at 800 and when it is put into drive the rpm go to 200 and it bogies when i do not give it lost of gas the idle air valve is working and can not find a vacuum leak. need help.

GMstrong Enthusiast

GMstrong

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Posted

how about the plugs,wires,cap,rotor?go to the nearest junkyard pick pocket the map sensor,egr valve,tps,and take a gander at the injector spray.Check the fuel pressure to seems to be the cause of alot of problems.

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