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Passport DX
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Engine Controls - Tests W/O Codes - 2.6L
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Symptoms
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Backfire
Engine Controls - Tests W/O Codes - 2.6L: Symptoms: Backfire
Check ignition timing.
Check ignition coil output.
Check for faulty spark plugs.
Check EGR system.
Check for crossfire between spark plugs.
Check for correct valve timing.