Thread: my 91 won't pass CA Smog, Nox fails?
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Old 08-24-2004   #12
FU
 
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Join Date: Mar 2004
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OK. Now you may want to pull the EGR valve and make sure it is clean and working correctly. Next , How many mile's are on the car ?
High NOX usually mean's :
1-Chip
2-EGR
3-Cat's going out
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