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1994 Infiniti J30 J30 wont pass nox on emissions

Tiny
TATMAN2
  • MEMBER
  • 1994 INFINITI J30
Engine Performance problem
1994 Infiniti J30

i have a 94 j30 that I am trying to get through emissions here in az. I failed the gas cap test and replaced it now my nox is failing. I have replaced the egr valve, the gas cap and still failed with a higher reading on the nitrogen. Could the cataletic conv. Be a problem? Please dont tell me I have to replace the knock sensor! Any help will greatly apperciated. Thanks
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Monday, March 15th, 2010 AT 5:36 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the catalytic converter or a computer controllerd system thats locked-up in the open loop mode-

Did you clean up the EGR passages thoroughly and EGR valve functioning as designed?
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Monday, March 15th, 2010 AT 7:24 PM
Tiny
TATMAN2
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  • 2 POSTS
Yes I did check and clean the tubes as best I could. This was a real bitch. It would have been eaiser to pull the motor out to get to the egr valve. The car belongs to my step-son so money is tight. What would you recommend be the next step without to much money. I do have a code scanner but there has been no warning lights or check engine. Should I check for any codes that might be stored but not ilumanating? The egr is new
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Monday, March 15th, 2010 AT 8:48 PM

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