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I failed emissions after putting on a Cadillac.

Tiny
TRIPPINANGEL
  • MEMBER
  • 1991 GMC SONOMA
  • 200,000 MILES
I failed emissions after putting on a Cadillac converter.I now have put on new plugs and wires.I was told to ajust the valves.I don't know how. How do I ajust the valves and how much do I ajust them?
Friday, April 5th, 2013 AT 1:32 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
They are hydraulic no adjustment there. Here's what to do, change air filter and oil, and oil filter, drive on exspressway 15-20 miles before testing then go for a test it should pass
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Friday, April 5th, 2013 AT 1:59 PM

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