Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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how bad was the throttle body??? was it carboned up badly???
it sounds like the throttle plate is hanging up and not closing all the way. re check it to verify the plate is closing all the way
was this an issue prior to cleaning??
I would try re cleaning it. it sounds like the plate is not seating properly. if that does not work, you may have to replace the throttle body
ok, then without me being there, I cannot help you any more. I will open it up to other guys to see what there opinions are at this point
im cam, a licenced diagnostic tech.
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did you do a idle relearn on this after cleaning the throttle body?
any time a throttle body is cleaned and replaced , there should be an idle relearn performed,
this should be done with KOEO, not running.
most people do it with the engine running, than it doesnt work. the engine must be off with key on for it to learn.
i have had to send a few to the dealer just to have the pcm reflashed as the idle learn doesnt always work ffor some reason. but the reflash always works
there is a chance the throttle body was damaged during cleaning. it doesnt take much when pushing on the plate that it can throw it off.
they can be damaged while cleaning.
i realize you dont want to take it to the dealer, but it could just require a simple reflash.
i have probably done a thousand of these tb services, and they should all have a relearn with a tech 2 after and some have required a flash after.
the way you describe it, its either binding or the pcm is the issue