Question about 1994 Chevrolet S-10
2.2leter failhcppm and co%
Posted by Anonymous on
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Posted on Jan 02, 2017
Hydro Carbons are usally from an engine missfire. It may be that it is such a sligh miss that you cannot feel it. What is your timing set at? I would try setting it at 2* advanced and see what that does for you.
Posted on Oct 13, 2009
Does it have a vacuum leak? If it was that bad it should have thrown a code. That being said the first thing I do with a vehicle that fails emissions is to replace the o2 sensor. o2 sensors start wearing out the day they are put in. Generally I like to replace mine once a year though I know that is a bit of overkill. It does make sure the system is running topnotch. keep in mind my vehicle only has one o2 sensor.
Posted on May 27, 2010
Sounds like you lost O2 Control
Check fuel trim & data with professional
scanner & such
You done as far as working at home, you did all
You have a rich condition (CO)
Seems as though the coolant sensor is not working &
your in open loop
Posted on Mar 05, 2013
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