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Old 06-30-2006, 01:50 AM
2000CAYukon 2000CAYukon is offline
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Re: Idles rough, lose power when reaching operating temp

This sounds like a clogged cat to me. Is it the original cat? Do you even have a cat?

Drive it at night and park in a dark area and see if the cat is glowing red. An exhaust back pressure gauge can also be hooked up to see if there is a restriction in the exhaust.

//2000CAYukon
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