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post #1 of (permalink) Old 04-21-2003, 11:36 PM
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Failed Texas emission test

Hi Fellas, I haven't posted in a while because my Jeep has been running pretty well. Anyhow, I took it in for the annual Texas cash grab and failed the emission test and retest. $39.50 out the exhaust. My Jeep failed on CO and NOX. 3.37 CO & 1471 NOX at high speed (25 mph).
I have all of the original pulse air crap working properly, no exhaust leaks, new air filter, and replaced the egr valve about 10 months ago.
I could use some advice. I'm hoping it's something simple, but my gut tells me it's never that easy. Anything that could be offered would be greatly appreciated.

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post #2 of (permalink) Old 04-22-2003, 12:24 AM
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Re: Failed Texas emission test

check that your cat converer is working properly.
From your results it looks to me that you are running rich (CO), and that there might me excessive engine temperature in combustion chambers. That can be EGR syst., retarded timing, problem with coolant system
Also, check this Smog Tips
smog term defs

HTH and good luck
RedCJ7 is offline  
post #3 of (permalink) Old 04-23-2003, 02:31 PM
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Re: Failed Texas emission test

Thanks Red, sorry I took so long to get back. Haven't brought it back for another test. I'll post the results.
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post #4 of (permalink) Old 04-23-2003, 10:22 PM
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Re: Failed Texas emission test

I lived in Houston up until about 2 months ago and I did a lot of research to try to find a way to get around emission checking my 81 Scrambler. Turns out the way the law is written, you only have to have a vehicle emissions tested if it is "primarily" driven in one of the couties requiring testing. If I remember right, they define "primarily" as driven more than 60 days im a year. That definition didn't fit my Jeep, so I called a local testing center and they said you can take it to get inspected at a station outside of the required counties and tell them you live in Houston but you don't primarily drive your Jeep there. Then they will make you sign some form and then inspect your rig without the emmisions.

I ended up getting transfered (to a non-emissions testing area) before I actually tried it, but it may be worth looking into in your case.

Good luck!
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