Question about 1992 Oldsmobile Cutlass Supreme

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Cant pass smog failed nox got 2032,allowed 695 95 bmw 318i

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  • celsobatilo5 Jul 02, 2009

    i going to install a new cat nut do you think it will make a dramatic difference

  • Marvin
    Marvin May 11, 2010

    sounds like a worn cat

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Since your car has no EGR valve, you have one of two problems. You either have a bad O2 sensor, making the car run lean, or you need a new Cat. Or, you've had a bad O2 for so long that it ruined your cat, and now you may have to replace them both. Either way, I'd highly recommend having a smog tech take care of this problem for you, since you have no access to a smog machine that will tell you if the repairs you've done have solved your problem.

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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1 Answer

Does not pass smog at 25mph


IT FAILED AFTER THE CAT TOO?
NO RESPONSE
SO

POST THE FAILED REPORT
THERE IS NO HELPING ANYONE LACKING THAT.
CO =
HC=
NOX=
-----
IF PRESENT
CO2=
O2=

DATA MATTERS. BIG TIME.

WHY GUESS?
WHY GO BROKE DOING ALL THAT.?


The engine is running real bad.
this is a fact.
due failing with new cat.
so....
scan it yet
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or ask you mechanic to do that, he knows how.

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