Question about 1989 Ford Mustang

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My 1989 Mustang 5.0 backfires through the engine when I shift gears and give gas. What is wrong?

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Sounds like either your timing is off or the fuel intake needs adjusted (if carburated).

Put a timing light on it (after knowing where the timing marks needs to be at) and make sure it is timed right. If so, any smaller adjustments can be made using the distrubutor (if equipped).

If you're car has coil packs instead of a distrubutor, you may need to replace the cam shaft sensor and/or crankshaft sensor.

Also ensure the harmonic balancer is in good condition and is not cracked, or any rubber (if installed) is not broken or any chunks are missing. These can throw off the balance of the entire engine.

Please let me know if you need further assistance.


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Posted on Aug 30, 2010


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