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Re: High Idle.
Is it tbi or carb? If its tbi and it only does it when you first started it its normal, especialy if its cold out. If you let it run for a little does slow back down?
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87 GMC Sierra 2500 4x4 350/TH350/NP203 Flow Tech long tube headers, throttle body spacer, Edelbrock Performer cam, true dual Flowmaster 40s, 6 inch Superlift suspension lift
2000 silverado extended cab stepside 5.3l. Stock for now
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