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Re: SBC 350 Engine Backfire Through Exhaust and Carb
Popping through the exhaust is generally a rich condition. Raw fuel in the hot exhaust ignites and causes the popping. Popping through the carb is usually a lean condition or improper timing. Did you run a zddp additive and the proper oil during break in? How exactly did you break it in? Did you let the engine idle at all? What oil are you running now?
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.
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