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4.3 liter engine. throttle body not working...its a 1988 not a 1990

(1990 GMC S15 Jimmy)
in Biloxi, MS on August 22, 2009
gas goes into the throttle body but doesnt come out. i have cleaned it and changed the injectors and it still does it. it happens about 1 out of 5 times i try to start it.
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on April 09, 2010
1990 gmc sonoma 4.3 ,gas goes into the tbi, but doesn't
come out.still engine doesn't start. what's wrong with it? please answer.
on August 22, 2009
I assume when you say that the throttle body doesn't work you mean it doesn't start. It would be very helpful if you could tell us what size engine you have.
on February 15, 2012
change the tps (throttle posicion sensor) that will fix it..
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