1994 GMC Van emissions fail

1994 GMC VAN
87,442 MILES • V8 • 2WD • AUTOMATIC
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MILTON CRAIN
  • MEMBER
  • 1 POST
idle-fail HCppm=663 reading 220 standard CO% =3.39 reading 1.20 standard
Sep 15, 2010 at 7:26 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the catalytic converter and the air injection pump
Sep 15, 2010 at 9:41 AM
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