NOx levels high did not pass emissions

rabbit007

Registered User
I have an 89 SC. It did not pass emissions on the NOx. the car was driven
for 30 min's at highways speeds to get it
to operating temp. Tech said it might be the EGR system. Any ideas? Is the EGR difficult to change? Or is there a test to determine if it is bad?
 
smog

on mine they said egr i had fixed it still didnt pass so I had cats replaced wah lah passed with flying colors, I had new head pipes made with new cats that bolt to exh just front of res so I can revert to this stock setup for smog as I have exh cutouts and old cats on car for every day use i keep my cats for smoging time ,also my cats will still be new when I smog next time
 
You might be right with that one. The cars does have 154,000 miles on her. And, thankfully, the headgaskets are still intacked.:D However the temp gauge reads a bit on the low side of the scale.
 
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