1991 Gmc Sonoma Failed Emissions After Putting On Cadillac Converter Now Put

1991 GMC SONOMA
200,000 MILES
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TRIPPINANGEL
  • MEMBER
  • 1 POST
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?
Apr 5, 2013 at 1:32 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
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
Apr 5, 2013 at 1:59 PM
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