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A 1983 Chevy truck with a 305 engine may backfire after warming up due to several issues, such as a vacuum leak, incorrect ignition timing, or a faulty carburetor. As the engine heats up, these problems can become more pronounced, leading to an improper air-fuel mixture or misfires. Additionally, worn spark plugs or ignition components can exacerbate the issue. Checking these components and ensuring proper adjustments can help resolve the backfiring.

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AnswerBot

1mo ago

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