Hot idle stall
01-01-2009, 06:37 PM
#1
Melting Slicks
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Member Since: Dec 2003
Location: pawleys island sc
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Hot idle stall
My car is running great. But I've got a problem that I just can't trace out.
When I first start the car in the morning and its cold it idles up perfectly - starts out about 975 and idles down to a desired 835 like clock work.
Now I drive it for about 45 minutes or so and shut it down to go into a store to pick something up. When I get back in and start it up the revs go up, as it would normally do, but then drop all the way down to 400 rpm. If I don't touch the gas pedel the revs will go back up to 1300 rpm the drop down to 300 rpm, almost stall, the back up to about 1100 rpm, down to 500 rpm, up to 1000 rpm, back down to 700 rpm, up to 900 rpm and ,finally, back down to the desired idle speed.Its a real severe surgeing.
It ONLY happens when the car has fully warmed up.
I've got HP tuners, I've checked input air flow, cleaned the MAF, checked the TB but I can not figure what could be causing this surgeing.
Any thoughts or suggestions will be greatly apprecicated. Thanks.
When I first start the car in the morning and its cold it idles up perfectly - starts out about 975 and idles down to a desired 835 like clock work.
Now I drive it for about 45 minutes or so and shut it down to go into a store to pick something up. When I get back in and start it up the revs go up, as it would normally do, but then drop all the way down to 400 rpm. If I don't touch the gas pedel the revs will go back up to 1300 rpm the drop down to 300 rpm, almost stall, the back up to about 1100 rpm, down to 500 rpm, up to 1000 rpm, back down to 700 rpm, up to 900 rpm and ,finally, back down to the desired idle speed.Its a real severe surgeing.
It ONLY happens when the car has fully warmed up.
I've got HP tuners, I've checked input air flow, cleaned the MAF, checked the TB but I can not figure what could be causing this surgeing.
Any thoughts or suggestions will be greatly apprecicated. Thanks.
01-03-2009, 03:57 PM
#3
Melting Slicks
My car is running great. But I've got a problem that I just can't trace out.
When I first start the car in the morning and its cold it idles up perfectly - starts out about 975 and idles down to a desired 835 like clock work.
Now I drive it for about 45 minutes or so and shut it down to go into a store to pick something up. When I get back in and start it up the revs go up, as it would normally do, but then drop all the way down to 400 rpm. If I don't touch the gas pedel the revs will go back up to 1300 rpm the drop down to 300 rpm, almost stall, the back up to about 1100 rpm, down to 500 rpm, up to 1000 rpm, back down to 700 rpm, up to 900 rpm and ,finally, back down to the desired idle speed.Its a real severe surgeing.
It ONLY happens when the car has fully warmed up.
I've got HP tuners, I've checked input air flow, cleaned the MAF, checked the TB but I can not figure what could be causing this surgeing.
Any thoughts or suggestions will be greatly apprecicated. Thanks.
When I first start the car in the morning and its cold it idles up perfectly - starts out about 975 and idles down to a desired 835 like clock work.
Now I drive it for about 45 minutes or so and shut it down to go into a store to pick something up. When I get back in and start it up the revs go up, as it would normally do, but then drop all the way down to 400 rpm. If I don't touch the gas pedel the revs will go back up to 1300 rpm the drop down to 300 rpm, almost stall, the back up to about 1100 rpm, down to 500 rpm, up to 1000 rpm, back down to 700 rpm, up to 900 rpm and ,finally, back down to the desired idle speed.Its a real severe surgeing.
It ONLY happens when the car has fully warmed up.
I've got HP tuners, I've checked input air flow, cleaned the MAF, checked the TB but I can not figure what could be causing this surgeing.
Any thoughts or suggestions will be greatly apprecicated. Thanks.
If you can, send me a log, with st fuel trims and lt fuel trims, as well as temp, tps %, map, maf, etc. Send me your tune too.
Email addy is edcmat-l1@msn.com