I have a 2004 Chevy Colorado LT and it idles at about 800-900 rpm and when I rev it just a little it drops down to 500 and takes a second to go back up to 800. I was wondering if maybe this is a dirty throttle body.

  • If you suspect a dirty throttle body, it's a fairly simple matter to removed and either clean or replace it. – jwh20 Dec 21 '19 at 11:08

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