ENGINE IDLES ROUGH

2003 GMC Yukon

Tiny

bugs7232

September, 19, 2012 AT 8:11 PM

The 5.3 engine in my 2003 GMC Yukon, idles very rough with the rpm's loping between 400-1000. Seems to be worse when damp or wet outside. Idles so rough at times, the engine dies. No codes, no check engine light, no warnings. Any ideas?

FOUND 4236 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

hmac300

September, 19, 2012 AT 8:22 PM

Try cleaning the throttle plate on both sides with choke cleaner and see if that helps, it may be gummed up. Make sure to hook up air ductingwhen done.

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