NEW EXHAUST PIPES NEW CATALYTIC CONVERTERS2 WENT...

  • Tiny
  • Poolshot
  • 1989 Chevrolet Silverado
  • 69,000 miles

New exhaust pipes, new catalytic converters(2) went to inspection for emissions test. Failed hydrocarbons and Canon monoxides. Mechanic checked motor and can't understand why it didn't pass. Thanks for some help?

Thursday, February 28th, 2013 AT 1:17 AM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

First you need a new mechanic

could be a bad o2 sensor, plugs worn out, oil contaminated with fuel.

It will have to be examined by someone who has knowledge of the gases.

Roy.

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Thursday, February 28th, 2013 AT 3:47 AM

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