1996 Toyota Corolla Hc Emissions High 15mph Max 64 Meas 145 25mph 47 51 Could

1996 TOYOTA COROLLA
258,190 MILES
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Hc emissions high 15mph max 64 meas 145. 25mph max 47 meas 51 what could be the problem
Feb 11, 2013 at 3:51 PM
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WRENCHTECH
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HC is unburned fuel so you have to look for where it could be coming from. Simply changing the oil will sometimes help a lot but it usually comes down to incomplete combustion/misfire.
Feb 11, 2013 at 3:57 PM
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