Accelerator pedal problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stellaontap · 01-12-2026, 07:19 PM

Hi all. I’m doing a LQ4 swap into my 1979 GMC Camper Special. I just did a first start and it idled and ran pretty good. There is a problem I am fighting with and that is when I press the gas pedal the RPM increases a couple of hundred RPM and then drops back to idle. If I keep the gas pedal pressed it just keeps doing that and starts to run rough. Has anybody run into this problem and if so how did you solve it?

Thanks
Eric

01-12-2026, 07:19 PM	#1
stellaontap Registered User Join Date: Mar 2014 Location: Dorchester Posts: 28	Accelerator pedal problem Hi all. I’m doing a LQ4 swap into my 1979 GMC Camper Special. I just did a first start and it idled and ran pretty good. There is a problem I am fighting with and that is when I press the gas pedal the RPM increases a couple of hundred RPM and then drops back to idle. If I keep the gas pedal pressed it just keeps doing that and starts to run rough. Has anybody run into this problem and if so how did you solve it? Thanks Eric



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