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My 1997 chevy s-10 failed emissions but it had no codes. It said catylst, evalve, and egr was not complete.

I drove it over a 100 miles thinking I had to complete a drive cycle but it still failed.

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  • Chevrolet Master
  • 21,873 Answers

Could be a faulty thermostat not letting the engine warm up.

Posted on Dec 09, 2012

  • 2 more comments 
  • Anthony D. Dec 09, 2012

    What does the thermostat have to do with the catylst, evalve, and egr passing?

  • Anthony D. Dec 09, 2012

    Also my a/c isn't working. Does that have anything to do with it?

  •  Stephen
    Stephen Dec 09, 2012

    I doubt the ac would have any effect. If the engine does not get to normal temp the emissions system will not work properly.

  • Anthony D. Dec 09, 2012

    Oh ok thanks!

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Posted on Apr 07, 2011

dttech
  • 4803 Answers

SOURCE: 1997 chevy s10 zr2 failed emissions

You most likely have a blown Auxilliary Power Outlet fuse. (Happens all the time) The Auxilliary Power Outlet fuse also powers you Data Link Connector (DLC). If the DLC has no power, the computer scanner will not communicate with the engine computer.
Check Fuse #7 (25 Amp) in the instrument panel fuse block. (See diagram)


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Posted on Feb 05, 2012

nighttrain_r
  • 444 Answers

SOURCE: What's your problem? emissions not ready

****** your timing so it barely runs and have it tested again, i had to do this on a built motor i had in a pickup a while ago and it worked then. not sure if the testing standards have changed alot since but its an idea.

Posted on Mar 19, 2012

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