Friend of mine is trying to pass emissions here in Phoenix, AZ…but failed on HC…it’s an 87 GN…the car has a rebuilt engine with ported heads…no EGR...the test here in AZ is the dyno…used to be IM-240…now they call it IM-147…he has a Terry Houston cat on for a THDP…he put some denatured alcohol in with the 91 octane unleaded gas…the chip he is using is a stock factory emissions chip with the injector constant changed for 50 lb injectors
…I have passed a couple of times with my GN using the same chip…here are the limits and his numbers:
HC his car was 1.93….limit is 1.60
CO his car was 14.60….limit is 15.00
NOX his car was 2.16….limit is 2.50
…any ideas of why he failed HC?...any suggestions…really appreciate any help
…I have passed a couple of times with my GN using the same chip…here are the limits and his numbers:
HC his car was 1.93….limit is 1.60
CO his car was 14.60….limit is 15.00
NOX his car was 2.16….limit is 2.50
…any ideas of why he failed HC?...any suggestions…really appreciate any help