Subject	Failed emissions for NOX..strategy to pass
Posted by	drew32 on November 12, 2012 at 8:41 PM
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Message	My 1991 TT failed emission for NOX NOX was 2.9177 GPM with a limit of 2.5 CO was 8.2112 GPM with a limit of 20.000 HC was 0.5985 GPM with a limit of 1.2000 Car has JWT ECU, catback, and pop filter. Stock cats and precats. Injectors replaced with updated stock ones about 5k miles ago. I understand that I can probably get it to pass by taking some hard runs beforehand and going right in for the test with the cats hot. I am in DC so I may have to wait a bit at the garage (I was idling and inching forward for 30 minutes before the test last time). Is idling for 5 minutes gonna ruin my chances? Any other strategies short of cleaning the EGR (no warning lights on but that search turns that up as a possible culprit). Thanks.
Follow Ups	Failed emissions for NOX..strategy to pass - drew32 20:41:21 11/12/12 Check EGR Vac Lines and Function - Cjw3 21:36:36 11/12/12 Retard your timing 5 degrees = 10degrees below TDC. (n/m) - ZTicket(Dallas) 07:35:44 11/13/12 I'm having the same problem, just failed for high NOx. - Under_Powered 18:18:28 11/13/12 It worked for me. Failed NOX, tried pulling a vaccum hose on - ZTicket(Dallas) 08:28:02 11/15/12 You have a vacuum leak imo.... - Z-staffa 12:10:28 11/13/12
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