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Car Forum / GMC Cars / April 2006

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91, buick Skylark, Wide open idle

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Xero Blade - 22 Apr 2006 09:56 GMT
I have a question for all you nice people out there. I have a 91 buick
skylark 2.5L Throttle body. It has many problems but i want to get it
running correctly again cause it has a mint body and it starts at
least. The one main problem is when I start the car it runs like its
wide open and over heats very quickly, 5 mins or less. Now i checked if
the gas pedal is stuck but it work fine. there was slack on the gas
cable going to the throttle body and its still doing it. the butter fly
is closed but it runs at a crazy high rpm like a if you was to put your
foot on the gas a little bit while in park. Im thinking it could be a
wide open idle sensor or the throttle postition sensor, Any ideas out
there. Thanks beforehand to anyone that can help.

Signed,
XeroBlade
Brian - 22 Apr 2006 17:26 GMT
Hmmm...wide open idle with the throttle closed means...air (lots of it) is
still getting into the intake.  The engine will run very lean (more air than
fuel in the air/fuel mix) and overheat.  My best guess is a vacuum device
connected to the intake or injector system is either unplugged or the
connecting hose is toast.  I once saw similar symptoms on my 2.2l Cavalier
when the hose connecting the PCV valve to the intake disintegrated.
=AB Paul =BB - 22 Apr 2006 19:08 GMT
> I have a question for all you nice people out there. I have a 91 buick
> skylark 2.5L Throttle body. It has many problems but i want to get it
[quoted text clipped - 10 lines]
> Signed,
> XeroBlade

Fire needs air.  No air=no fire.  Find out where the air is getting in.
 
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