Hc emissions high 15mph max 64 meas 145

Tiny
ANONYMOUS
  • MEMBER
  • 1996 TOYOTA COROLLA
  • 258,190 MILES
Hc emissions high 15mph max 64 meas 145. 25mph max 47 meas 51 what could be the problem
Monday, February 11th, 2013 AT 3:51 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
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.
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Monday, February 11th, 2013 AT 3:57 PM

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