im working on a 96 civic ex, and can not get it to pass ca emission test
all readings are high at 15 and 25
HC:160 at 15 100 at 25
CO:.5 at 15 .3 at 25
nox: 2900 at15 2500 at 25
c02: 14
this car have 180000 miles, new cat, new o2 sensor , complete tune up.
if i super heat it in manual mode it will pass, if i super heat it and let it idle for about 5 min. readings are way off again. no check engine lights and it runs great.
I need help!

 

Errr...I think you are in the wrong forum. This is Prelude.

 

well the hotter the cat gets the better it works so of course if you "super heat" the cat you have a better chance at passing, why do you think they idle it for a while and haev you turn it off before the test. It's so you cant go to some backroad and crack open VTEC for 10 mins 2 seconds before the test and pass an illegal motor.

it sounds like the cat but you said you got a new one, how long ago did you replace it?
is the car stock?
what motor is in it?
you have any to de-tune it to pass?

by the by this is the prelude forum might wanna ask the civic guys they might be of more help.