02 s10 4.3 start problems

12-24-2011, 11:32 AM
my 2002 s10 4.3 want start unless u push the gas pedal down a little bit.Then it will start but if u don't hold the pedal down for a min at 1 to 2 thousand rpms it will die what mit be the problem.

12-24-2011, 12:20 PM
Welcome to AF, a few things can cause this, faulty idle air control, or carboned up passages, coolant temp sensor skewed, a full scan should be done to look at sennsor inputs, I assume this is a cold start issue.

12-24-2011, 01:14 PM
yes its a cold start problem.I used a scan tool and nothing poped up on the sacner the problem started after i had the intake manifold gasket replaced it run fine before.

12-25-2011, 01:03 PM
No codes, but what do the int.and coolant temp sensors read when cold?

12-29-2011, 03:11 PM
could it be a bad iac valve

01-09-2012, 10:26 PM
it was the iac valve .I cleand it and unpluged the battery and it started right up and idles fine now

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