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But the cause might be anything from a hard-to-find vacuum leak to dirty fuel injectors, low fuel pressure, a weak ignition coil, bad plug wires, or compression problems. Even a dirty MAF sensor can cause a lean code and/or misfire to occur. The engine may be stalling because it isnât getting enough throttle opening. The cause is often a problem in the idle air control system. The first thing to check is the intake vacuum with a vacuum gauge.
A misfire condition and its corresponding misfire trouble code can be the result one of many different components having failed... that troubleshooting its cause can seem almost impossible. For example, the misfire code could be caused by a bad Coil-on-Plug (COP) ignition coil, or a bad fuel injector, or in one engine cylinder having very low compression, and the list could go on...