1994 Buick Regal FAILD EMISSIONS

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?

1 Reply

DOCHAGERTY

MECHANIC
9,601 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