Question about 1985 Chevrolet Chevy

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Vaccum hose diagram for 88 chevy truck. I put a 350 motor in my 88 chevy 1500 truck from a 95 suburban. I cant get the throttle body to stop idaling to high. I may need a vaccum line diagram for this motor to make things work right.

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  • Richard Scordino May 11, 2010

    did you change over all the sensors and stuff from the 88 to the other engine? What happens if you block off all the vacuum lines except for the one that goes to the map sensor?

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It may not be a vacumn leak from a line,check the throttle shaft for movement,for example,i had a 89 1 ton 350 and my throttle shaft was moving around a lot and in order to keep it from idling high,i had to kick the throttle pedal.But also check the idle air control valve,which is the round sensor on the side of the throttle body.

Posted on Sep 11, 2009

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Posted on Jan 02, 2017

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