06-06-2017, 10:43 PM
Howdy, long time no see. Hope all are well.
Am at 184K miles, about, original engine.
I seem to have developed the somewhat common fast idle issue…where the warmer the engine gets (starting from cold), the faster it idles?
If I let it continue creeping up, it goes beyond 3300 rpm. Starts fine cold, idles up to the usual 1600-1800…comes down a little, then when you'd think it would begin to go back down to 800-900, starts creeping up the more the engine warms.
I have the 8 valve engine, 1992 4wd 5 speed LSI. Has the original thermostat on this car I think, still. That a potential cause of this? No obvious vacuum leaks found yet, though reading through some posts here indicates likely cause.
This is a warm-up idle problem…hotter engine gets, faster it idles.
Old news: my DIY rebuilt trans with the lovely bad-ebay-seller-maybe-sent-me-used-bearing noise now has 1,000 miles on it since, still noisy, but still working-- though I have what sounds like either a U-joint clunk on letting the clutch out sometimes (in the back), or (gosh forbid) the driveshaft nuts loosened…still need to check.
Second gear still grinding on the shift until warmed up all the way. (only in motion, stopped is perfect). Not sure if due to gunky synchro, or just that oil I used is not loved by 2nd gear synchro sliding parts.
Thanks for any suggestions on the idle.
Am at 184K miles, about, original engine.
I seem to have developed the somewhat common fast idle issue…where the warmer the engine gets (starting from cold), the faster it idles?
If I let it continue creeping up, it goes beyond 3300 rpm. Starts fine cold, idles up to the usual 1600-1800…comes down a little, then when you'd think it would begin to go back down to 800-900, starts creeping up the more the engine warms.
I have the 8 valve engine, 1992 4wd 5 speed LSI. Has the original thermostat on this car I think, still. That a potential cause of this? No obvious vacuum leaks found yet, though reading through some posts here indicates likely cause.
This is a warm-up idle problem…hotter engine gets, faster it idles.
Old news: my DIY rebuilt trans with the lovely bad-ebay-seller-maybe-sent-me-used-bearing noise now has 1,000 miles on it since, still noisy, but still working-- though I have what sounds like either a U-joint clunk on letting the clutch out sometimes (in the back), or (gosh forbid) the driveshaft nuts loosened…still need to check.
Second gear still grinding on the shift until warmed up all the way. (only in motion, stopped is perfect). Not sure if due to gunky synchro, or just that oil I used is not loved by 2nd gear synchro sliding parts.
Thanks for any suggestions on the idle.