idling 03 yukon
06-22-2007, 09:27 PM
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idling 03 yukon my 03 yukon when first cranking, and at different times will idle up and down,i took to shop and it has no codes , and they ran supposedly a vaccum test.everything with nothing wrong.what to do????????????????????
06-25-2007, 04:11 PM
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Are you sure it' s not the AC compressor kicking on? 
All engines idle up and down to a certain degree, what range does it vary in? Which engine? You' d probably get a better responce from Newbie Tech, or the GM section of the Performance Trucks forum, link up there ^^^^
All engines idle up and down to a certain degree, what range does it vary in? Which engine? You' d probably get a better responce from Newbie Tech, or the GM section of the Performance Trucks forum, link up there ^^^^ 
06-25-2007, 04:25 PM
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My car idles like that from time to time. It also sticks at like 1,000RPM, after a burnout at the track sometimes. I' ve never figured out a cause, or had a problem because of it. 
06-25-2007, 04:28 PM
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Check the spark plugs and wires. My z28 did that after a new spark plug and wire install. The plugs had backed themselves out a little and the wires were not on as tight as they should have been and it caused the same issue you mentioned and didnt fire a code.