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#1
01-05-2004, 03:42 PM
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Emmissions Hell
Help!! I just bought a 93 Grand Am SE V6 3.3L. K...the guy swore to me that it would pass inspection cuz it had a new cat on it WHATEVER!!!!!!!! The nox is high about 10 points. The only suggestion I've gotten so far is to clean/replace the egr. I'm in the process of doing this, but are there any other "economical" options before I blow the car up??
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#2
01-05-2004, 05:29 PM
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Re: Emmissions Hell
Hhmm NOX huh? I have a 91 Lumina that (3.1) that had troubles with that (actually replace 2 CATS because of it, still failed). Somewhere in the world of the internet I found NOX could because of carbon build up (maybe but not exclusively with EGR) . The NEW garage I took it to (with that info) ran about a dozen carbon treatments on it and finally got it to pass (barely). Just a thought, I don't know if this is the case in your vehicle. Good luck
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#3
01-05-2004, 08:11 PM
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Re: Emmissions Hell
Nox is a byproduct from the engine running the combustion chamber too hot. Decrease the combustion temps and it will pass.
__________________
Shop Foreman Buick Pontiac and GMC dealership ASE Master Tech ASE Advanced L1 GM Master tech Licensed Aviation mechanic
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