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davepl · 10-23-2016, 01:47 PM

Check your cam sensor connector to make sure it's solid, though I doubt it would actually run otherwise.

Have you changed anything about the ignition tables? If your cranking spark were way off, it'd do that.

10-23-2016, 01:47 PM	#4
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,334	Re: Carbed LS swap Backfire Check your cam sensor connector to make sure it's solid, though I doubt it would actually run otherwise. Have you changed anything about the ignition tables? If your cranking spark were way off, it'd do that. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible