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06-15-2014, 09:39 PM
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#1 |
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Registered User
Join Date: May 2004
Location: Russellville, AR
Posts: 15
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Idling problems
I have a 2000 chevy Z71 and I am having idling problems. It runs fine when it's still cold but after it gets warm it idles down past 500 rpms, I have changed the IAC sensor and nothing different. I changed the fuel filter and the same results. I checked all around the intake for air leaks and haven't found any. A buddy told me the cataylitic converters may be stopped up. I don't want to start swapping things out spending a bunch of money. Any help would be appreciated
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06-17-2014, 09:54 AM
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#2 |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,535
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Re: Idling problems
You should start off with the basics.
have it scanned for codes and a look at vacumn, fuel trim, etc. check fuel pressure a good muffler shop can test the back pressure before the cats to help rule out a plugged up cat or muffler simply by removing the o2 sensor and inserting a pressure sensor. If there's blockage the truck will be down on power especially under wot. a vacumn leak can be down under the intake manifold runners making it hard to locate. and these composite manifolds are prone to cracks.
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