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Replace the spark plugs, wires, distributor cap and spark plug wires.Chances are your vehicle is in need of a good tune-up. Mark adjust your timing

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Q: Your 1990 Jetta is backfiring what can be done to fix it also is sometimes has poor acceleration?
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It could be timing or a bad distributor cap. There are other possibilities as well but those are the two best candidates. Check the Spark plug wires. I had the same problem and it was due to corroded rubber insulation on my wires. resulting in electricity arcing over to the engine! this was not good, but a change of the wires was all it took to fix it!


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