the Acura dealership will replace the plug wires
Listen to the advice you're getting here. Drive the car 30 minutes and keep it running before the test starts to keep the cats hot. It'll pass.
Everytime I take my OBD-I 94 for smog it is a funny drama. The technician struggles mightily to figure out a place to keep the RPM pickup thing. He ends up adjusting it some 10 times. To make it worse I never take notes and always forget where the last best location was :-(. Once that is done, I need to convince him to keep the car running for like 5-10 minutes before even attempting the smog testing.
The last time, it failed with a hgh HC count. I made him keep the car running for a while on the dyno and then redo it and it passed. He insisted that other than burning gas it would do nothing. Was left shaking his head when it did pass .
I did replace my O2 sensors right after that, My gas mileage in city driving went up from 19.5 mpg to 21.4-22mpg after the O2 sensor change. So something was suboptimal with my old O2 sensors. I am hoping that I will pass smog easy the next time.
So. Get it nice and hot before smog. If that fails, replace O2 sensors and then go for the smog test.
On '91-94 NSX bad cats will never pop a code,
I'm having problems smogging a stock out-of-state 98 NSX.
There was a recent post about a NSX with high flow cats passing smog in CA. It was running well.
the car is still not passing smog. This is what i have tried:
new spark plugs wires
smog numbers slightly varies but this is one instance.
I've tried a few different places, including a pre-test at Acura.