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backfiring typically means that the fuel system is dumping way too much fuel into the engine. The fuel injection system is computer controlled, and shutting it off reboots the computer. It also may give the faulty component a chance to cool off. Diagnostics of the computer using a scan tool will likely find the fault (some auto parts stores will do a scan for free) it could be a faulty fuel injector, or any of the components that control the injection system, which can include many different engine sensors (throttle position sensor, oxygen sensor, coolant temp sensor, etc.), or the main engine control unit (computer). It is critical that the diagnostics are done first...don't just start swapping parts.

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βˆ™ 2006-07-26 19:35:27
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