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Ls swap, losing throttle response when warm

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Old Apr 2, 2015 | 11:02 AM
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Default Ls swap, losing throttle response when warm

We have a 1968 camaro with an ls3 gm performance engine, coupled with a lokar throttle pedal assy and throttle body. It was wired with a painless harness.

The car starts and runs fine for about a mile, and then it goes to idle, starts misfiring, and completely loses throttle pedal response. After shutting it down for a minute or two, it will drive fine for another mile or two until it happens all over again.

We got this car complete, so we aren't sure of the wiring quality (aside from outer appearance, which is good)

I have seen one other thread about a similar problem, but I can't get ahold of the guy.

Has anyone seen this happen before?
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Old Apr 2, 2015 | 09:59 PM
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I just went through this same deal, only with the original pedal and throttle body on a 2010 Camaro L99. It would do almost the same thing you are describing, only when it went into limp mode, we would have to unhook the battery to get the throttle body to work again. Turned out to be a bad throttle body.
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Old Apr 4, 2015 | 12:03 PM
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Scan it for codes. That'll tell you if you need to chase the throttle body or pedal side of the system.
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