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Old 05-12-2021, 10:44 AM   #6
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Join Date: Dec 2009
Location: Independence Mo
Posts: 4,002
Re: LS swap fires then quits

Can you keep it running by feathering the throttle? I have had swaps that when you first hook up the battery after it has sat a while with it unhooked, that it won't stay running. It has to recalibrate where the IAC is, and once it's done that runs fine there after.
My '72 short bed build.

5.3 swap into my RUSTY '71 C10
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