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1985 Chevrolet S-10 Blazer Utility 4WD Base

1985 Chevrolet S-10 Blazer Utility 4WD
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February 25, 2009, 3:16 pm

Malcolm T
 

Question: idle up and down have to put fuel in throttle body to start

idle up and down have to put fuel in throttle body to start


February 26, 2009, 10:11 am

Tyler O
Expert Mechanic

Could be a number of issues. Sounds like something is wrong with the idle air control valve. Do a full tune up first, this solves most idle and starting issues. If you are still experiencing a problem check the IACV.


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February 26, 2009, 1:02 pm

Malcolm T
 

Ive done a full tune up, checked fuel pressure (about 14 psi), rebuilt the throttle body, new idle air control valve, tried 3 different fuel injectors. Thanks for your reply!


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February 26, 2009, 1:51 pm

Malcolm T
 

I also checked the timming and it was right on


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February 26, 2009, 5:25 pm

Tyler O
Expert Mechanic

Try bleeding the coolant of any air. Carefully check for vacuum leaks. If your engine has an idle up thermo valve, this is suspect.


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