The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Carb backfire issues....I need some advice

geezer#99 · 03-14-2018, 12:17 PM

Drive it awhile before you pull the covers.
Might be a power valve or something plugged up in your Holley. Or a vacuum leak. Or the po did some mods to the Holley.

03-14-2018, 12:17 PM	#4
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,517	Re: Carb backfire issues....I need some advice Drive it awhile before you pull the covers. Might be a power valve or something plugged up in your Holley. Or a vacuum leak. Or the po did some mods to the Holley.