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Old May 16, 2016 | 09:37 AM
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Default Idle problem

Does anyone know where in area of South Atlanta to get the LS3 computer programed to raise the idle. Mine is running around 450 to 500. Runs without any problems except when coming to a stop and then you notice the power steering starts to go a little.
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Old May 16, 2016 | 11:00 AM
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Originally Posted by Ghost Vette
Does anyone know where in area of South Atlanta to get the LS3 computer programed to raise the idle. Mine is running around 450 to 500. Runs without any problems except when coming to a stop and then you notice the power steering starts to go a little.
Have to admit never hearing of such an issue, ghost.
Not w/ a stock tuned C6, of any version.
Guessing you're not tuned or could have a tuner change idle or DIY.

Have you absolutely ruled-out an issue w/ MAF, which might cause your problem? Guessing.

Will BTTT.
Hopefully tech savvy eyeballs will/can read it & chime-in.
Sorry, I'm at a loss. G/L
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Old May 16, 2016 | 12:04 PM
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Originally Posted by Landru
Have to admit never hearing of such an issue, ghost.
Not w/ a stock tuned C6, of any version.
Guessing you're not tuned or could have a tuner change idle or DIY.

Have you absolutely ruled-out an issue w/ MAF, which might cause your problem? Guessing.

Will BTTT.
Hopefully tech savvy eyeballs will/can read it & chime-in.
Sorry, I'm at a loss. G/L
Landru Thanks for you reply. I need to be a bit more clear I think. This is a crate GM LS3 in a 63 split window. Has only 30 miles on the engine and drive train. The MAF is 4" away from the TB just as the instructions indicated. I wonder if the computer will adjust itself after a 100 miles or so. Every thing is stock and brand new. Kinda puzzling.
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Old May 16, 2016 | 12:37 PM
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The hand held tuners like Diablo Sport will do that if you know what the ECM is from. Do you have a port like a regular OEM computer?
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Old May 16, 2016 | 12:58 PM
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Originally Posted by simplegto
The hand held tuners like Diablo Sport will do that if you know what the ECM is from. Do you have a port like a regular OEM computer?
yes I do have the port. Was not sure a hand held could do the reprogramming in the way of idling. Thanks for the info.
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Old May 16, 2016 | 01:03 PM
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Sounds like a really great project you have going on there.
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Old May 16, 2016 | 02:02 PM
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Yeah, post some pics of the build, would love to see it
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Old May 16, 2016 | 02:06 PM
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Originally Posted by Ghost Vette
Was not sure a hand held could do the reprogramming in the way of idling.
Why I wondered if car was stock, it's not so yes you can get into ECM w/ a programmer & adjust idle. IF you don't want to do this yourself, take it to any reputable HP shop, ideally one specializing in LS engines. Doesn't sound serious & can be quickly remedied.

'63 SW w/ a LS3. ~sigh~ Sweet.
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Old May 16, 2016 | 02:11 PM
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Since it is a cool restomod you may want to double check all the vacuum lines and the bands that hold the air cleaner to the throttle body for tightness first. Vacuum leaks are notorious for low idle problems and stalling when you let off the throttle.
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Old May 16, 2016 | 04:16 PM
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From: Griffin Ga.
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Originally Posted by CadVette
Since it is a cool restomod you may want to double check all the vacuum lines and the bands that hold the air cleaner to the throttle body for tightness first. Vacuum leaks are notorious for low idle problems and stalling when you let off the throttle.
Good point. There are so many things to try to remember to do or get back to and I'm sure some things needs to be rechecked.
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Old May 16, 2016 | 09:45 PM
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As Landru says it's easy to do.

I had this problem after putting a crate LS3 in my '05. It ran great, but would die (or threaten to) when coming to a hard stop after high rpms. It was just the fuel/air mix, and it took a bit of fiddling and driving and fiddling to solve the problem.
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