![]() ![]() Also, be sure the carburetor is not flooding. A rich or lean carburetor can also cause engine to backfire. Check your carburetor calibration and operation.If the cam lobes are going flat this can also create a backfire. Listen for any signs of a camshaft going flat like noisy valvetrain.A vacuum leak can cause low vacuum and create a lean condition and can cause engine to backfire. If the camshaft is installed incorrectly this will lead to the valve opening at the wrong time and can cause the engine to backfire. ![]() Be sure the timing chain/camshaft was installed correctly.A leak down test can help determine if valves are being held open. Over adjusted lifters can hold valves open and cause the engine to backfire. Many things can cause engine backfires, below we will go over a few things that can cause backfires after a camshaft is installed. ![]()
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January 2023
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