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Dan, a glow plug may have lost its tip, which then went to the "wrong" place. Failed glow plugs often lose their tips, which hopefully find their way out the exhaust. My recent Mazda re-ring discovered dents and marks on all 4 piston from failed glow plug tips, one of which wedged between the piston edge and the cylinder wall on cylinder #2. None of the other cylinders had any remnants of glow plug tips, despite lots of indications of previous events. The engine developed a LOT of blow-by, due to the #2 piston being held off-center by the fragment, combined with worn rings that couldn't accommodate the change. Something like this may have occured in your engine. Open the oil filler while idling to check for 1) excessive blow by, and 2) strong fuel smell. Another possibility is a failed injector. Assuming the engine still idles, have you determined which cylinder is misfiring? That is done by loosening each injector pipe, sequentially. The "bad" one will have relatively little effect. If you haven't done this before, pay attention to the safety notes about it in your shop manual - it has its own specific dangers to be taken seriously. A stuck or failed injector may dribble fuel, rather than spray, resulting in loss of power, uneven running, a strong unburned fuel smell in the exhaust, and possible "knocking" (the fuel gets carried into the next stroke, igniting permaturely) | |||
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