what causes an engine to run rich

1995 FERRARI 456
80,000 MILES
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MKNIGHTMD
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what causes an engine to "run rich"
Jul 24, 2012 at 4:46 PM
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ASEMASTER6371
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lots of things. could have an engine miss, bad plugs, bad mass air flow, bad o2 sensors, bad injectors, clogged filter. any one of these and more could be the reason.

Roy
Jul 24, 2012 at 4:52 PM