Lt1 surging at idle
10-15-2010, 06:57 PM
#1
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Lt1 surging at idle its a 94 z28 with intake exhaust only. The car runs perfect driving down the road, no hesitations. But when come to a stop the car will run fine then at about every 20 seconds or so the car will go to 500 rpms and up and surge and then go back to normal still running a little rough. Then at times it can be surging and then go back to noraml and it does it about every 20 seconds. I replaced the IAC and that kept the car from shutting off like it did before. It now catches itself as i mentioned before. so any suggestions????
10-15-2010, 07:03 PM
#2
its a 94 z28 with intake exhaust only. The car runs perfect driving down the road, no hesitations. But when come to a stop the car will run fine then at about every 20 seconds or so the car will go to 500 rpms and up and surge and then go back to normal still running a little rough. Then at times it can be surging and then go back to noraml and it does it about every 20 seconds. I replaced the IAC and that kept the car from shutting off like it did before. It now catches itself as i mentioned before. so any suggestions????
10-15-2010, 07:17 PM
#4
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thats how mine is right now, runs seemingly fine driving. but at idle it does about the same. ses light comes on after a while, pulled a code real quick. random misfires.
10-15-2010, 07:32 PM
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10-15-2010, 07:33 PM
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10-19-2010, 10:58 PM
#12
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checked vacuum hoses and is good as far as i could tell.... the car will idlefine the drop to 600rpm catch itself, SES light comes on and car runs fine, then when i drive it the light goes off and the car does ok, then if i come to a stop and sit there for a few it will do it again... could this be a bad EGR??? at WOT the car does miss a little, but pulls fine through mid-range
