Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
So to clarify, you replace the TPS and throttle body and not the idle won't come down?
Do you have a scan tool to perform an idle relearn?
That should do it. Did you attempt a throttle position relearn yet?
Your scan tool should have an option under tests or functional tests. Each scan tool is different, but it should walk you through it.
If the scan tool doesn't do it you can always try the manual way. Disconnect both battery cables and hold them together for about 1 minute. Then have a helper hold the throttle plate closed by hand while you re-connect the battery cables. The throttle plate might try to open a little while holding it close, that's ok. Once the battery has been hooked up you can let it go. Then start the engine and see how it idles.
When you disconnect the battery? No. The key should be off.
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