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truckin 79 · 08-28-2018, 08:05 AM

I would say you might have a flat cam lobe(s). You could take valve covers off and see if any rockers are loose and check for bent push rod as well

08-28-2018, 08:05 AM	#22
truckin 79 Registered User Join Date: Jun 2014 Location: CO Posts: 772	Re: Backfire under loads I would say you might have a flat cam lobe(s). You could take valve covers off and see if any rockers are loose and check for bent push rod as well __________________ 79 Chevy 2wd BIG10 350 TH400