1994 Chevy S-10 Failed smog what's wrong

Tiny
DOUBLEDUBFIVETRE
  • MEMBER
  • 1994 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 158,000 MILES
My truck failed the emissions test and had high hydro carbons what could be the cause of this. Please help me out I need to fix it myself I think it's the cat because the check engine light isn't on. I just need to know what it could be before I buy parts. Thanks
Monday, August 23rd, 2010 AT 8:24 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
First thing to do is if your check engine light is not on, then replace your fuel/air and oil filters and change your oil. Then drive teh vehicle on the exspressway about 10-15 miles or so. Or a road like it. Then while it is still warm, take it to get it tested and it probably will pass. If it doesn't pass then, take it to a pro so he can check as to why. If your cat was going bad the truck would probably not have any power and drive like the exaust is plugged.
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Tuesday, August 24th, 2010 AT 6:18 PM

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