4.3 gm V6 races at high RPm after intake gasket change

Started by 348tripower, November 02, 2010, 10:21:07 PM

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348tripower

November 02, 2010, 10:21:07 PM
I looked at this tonight. Can't find anything wrong. The throttle body doesn't even open up and it is on high Rpm. 1999 S10. Everything looks to be hooked up. Where is it getting the air at to run? :shock:
Don Colliau

chimp koose

#1
November 03, 2010, 01:21:35 AM
vacuum line to power brakes would be the largest line off the manifold. It has to be getting air from somewhere.

taxpyer

#2
November 03, 2010, 01:29:06 AM
Timing? :shock:
What\'s that noise?,,, Never mind,, I\'ll check it later

rooster

#3
November 03, 2010, 10:59:56 AM
EGR stuck open! IAT sensor hooked up!  Carb cleaner in the intake?? How about any codes set.
Just some guess's.

enjenjo

#4
November 03, 2010, 11:00:59 AM
My guess is a gasket leaking under the intake manifold. The other alternative is a problem with the idle air control.
Welcome to hell. Here's your accordion.

348tripower

#5
November 03, 2010, 11:35:30 AM
Quote from: "enjenjo"My guess is a gasket leaking under the intake manifold. The other alternative is a problem with the idle air control.


It was late when I looked a this. I suggested pulling the intake again. Looks to me that with the elongated holes in the gaskets they could slip down and the bolts would go in over the top of them. I willl stop tonight and see what is up.
Don Colliau
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