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More than likely the emision system is not operating properly. Clean all electrical contacts, and check/verify all vacuum controll devices are operating properly. While I can't address a Mazda specifically, it should be noted that any time an engine is turned off the injectors are SUPPOSED to stop. You may have one or more leaky injectors that keep letting fuel out until the fuel pressure drops. That would be a real puzzle to me. Before that, I would check the timing. It is probably set too fast.

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โˆ™ 2008-02-17 13:07:29
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Q: 1984 Mazda b2000 it has a bad backfire and dieseling problem each time you shut off the engine it does one or both before coming to a full stop how do you go about fixing the problem at hand?
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