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Old 06-08-2013, 07:43 PM   #1
Gigem
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Join Date: Feb 2012
Location: Lakeway, TX
Posts: 335
Question New turn key crate motor backfires through carb

Brand new GMPP 350 HO crate motor. "Turn key", came with Holley 650.

Doesn't happen all the time, but every once in a while it backfires through the carb on acceleration. Sounds like a sneeze. Seems to happen more when I am driving the car easy. Otherwise seems to run great.

Timing was way off out of the crate, but is right now.

Any guesses? Or ditch the Holley and get an Edelbrock carb, as a buddy suggested...
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1972 GMC Sierra Grande (current truck)
1980 Chevy Stepside (gone)
1987 Chevy Blazer (gone)
1972 Chevelle SS Convertible (gone)
1973 Chevy Corvette (gone)
1967 Chevy Camaro (STOLEN!)
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