Mechanics

CHEVROLET SILVERADO MECHANIC PROBLEM

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?
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Poolshot
February 28, 2013.



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.

ASEMaster6371
Feb 28, 2013.