I'm attempting to not start throwing parts at this thing. Here's the rundown:
99 k1500, 136k miles - slight stumble at idle. NO CEL codes.
New fuel/air filters. Plugs have about 40k on them. Wires are original.
Am I correct in assuming that problems with EGR and Idle valves, temp sensor and misfires will show up in a CEL? I sure would like to think its vacuum related but haven't found a leak as of yet and its only a minor stumble. She seems to accelerate smoothly. The idle problem seems to have come on all of a sudden and not progressed - but I could be wrong.
Anyone offer a list of possible culprits?
Thanks
maury
99 k1500, 136k miles - slight stumble at idle. NO CEL codes.
New fuel/air filters. Plugs have about 40k on them. Wires are original.
Am I correct in assuming that problems with EGR and Idle valves, temp sensor and misfires will show up in a CEL? I sure would like to think its vacuum related but haven't found a leak as of yet and its only a minor stumble. She seems to accelerate smoothly. The idle problem seems to have come on all of a sudden and not progressed - but I could be wrong.
Anyone offer a list of possible culprits?
Thanks
maury