Mud in my Veins
Join Date: Mar 2000
Location: Paducah, KY
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Service Engine Soon light is coming on...........
Okay, so far I have changed the oil and filter, changed the coolant temperature sensor, and my buddy cleaned the PCV valve with some electrical cleaner today. Yesterday I changed the o2 sensor. Now, for some reason, when we started it after changing the oil, my SERVICE ENGINE SOON light comes on and stays on. Hmmmm....... It starts, climbs up to 1500 rpm pretty steadily, and then slowly drops down to 800 rpm. Normally, it climbs up to 1100-1200 rpm, then goes down to 800 rpm. What did I do? I changed the o2 yesterday, and I don't think there was a SERVICE ENGINE light. I think I would notice. I've tried disconnecting the positive cable, the negative cable, and now both. Still comes on. What gives? My buddy's dad says that I should disconnect the negative, wait 20 seconds, then reconnect it, and then drive it for about 20 minutes. Sounds logical, but then, would it still be on after I disconnected and reconnected it, or would it go off during the drive? Not to mention, if this does work, what caused it? Any ideas guys?
1992 Blazer Sport, 350 TBI, Gibson 3" cat back, 4L60, K&N, Rancho 3" lift, 285/75R16's on 16x8 Bajas [img]/wwwthreads_images/icons/laugh.gif[/img]