1994 Buick Regal FAILD EMISSIONS

Tiny
BIKERBILL
  • MEMBER
  • 1994 BUICK REGAL
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
MY 94 BUICK RIGAL FAILED ON HC READINGS WERE 1.3725 LIMITS ARE 1.2000 THE CO READINGS WERE 12.0420 LIMITS ARE 15.000 (PASS) NOX ARE GITTING CLOSE WITH A READING OF 2.9870 LIMITS ARE 3.0000 ENY THOUGHTS AS TO WHY IT RUNS GOOD AND DOUS NOT GET TO HOT?
Friday, June 27th, 2008 AT 1:08 PM

1 Reply

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
HC failure in an emissions test usually indicates a poor ignition or misfire. Try replacement of the spark plugs, use the manufactures' recommended plug and that it is gapped correctly.
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Monday, June 30th, 2008 AT 5:31 PM

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