Question about 1999 Lexus ES 300

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My 99 es300 has 240k on it and has been an amazing workhorse for me. it began jerking around today, and felt like an 02 sensor gone bad, it threw codes p0300b p0302 p0303 running real rough and trac and check engine lights on and flashing Plugs? Coils? no warning at all.

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Cylinder 2&3 misfiring, inspect plugs if ok, mark and swap coil packs for known good ones clear codes, run eng brake torque it rev to cause missfire, repeat until check eng, lite comes on, recheck codes if changed cylinders replace coil packs if not, you have two bad injectors.

Posted on Sep 29, 2010

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