Failed emissions test - ZR-1 Net Registry Forums

RHSZR1 · 09-16-2006

Took my 91 in for its emissions test today and to my surprise it failed. Problem is with high NOx on driving test, all other tests are O.K. Took the car to Vette dealer and had them check her over - cat's are O.K. and no problem with the O2 sensor, they flushed the injectors and then had it tested again - no improvement.

Car is pretty much stock, only use Mobil 1 and Sunoco 94 and it passed with flying colors last year. The Vette dealer wants me to drive her hard this weekend and then bring it back on Monday and they will test it again.

Any suggestions as to what I could do to improve my chances, or ideas as to what else I should check?

Ron

09-16-2006	#1
RHSZR1 Join Date: Jul 2006 Location: Thorndale, Ontario Canada Posts: 6	Failed emissions test Took my 91 in for its emissions test today and to my surprise it failed. Problem is with high NOx on driving test, all other tests are O.K. Took the car to Vette dealer and had them check her over - cat's are O.K. and no problem with the O2 sensor, they flushed the injectors and then had it tested again - no improvement. Car is pretty much stock, only use Mobil 1 and Sunoco 94 and it passed with flying colors last year. The Vette dealer wants me to drive her hard this weekend and then bring it back on Monday and they will test it again. Any suggestions as to what I could do to improve my chances, or ideas as to what else I should check? Ron