what to do to fix nox levels

maybe somebody has gone through this

my numbers were

at 15 mph
hc 113 max allowed were 61
co 0.51 max " " 0.54
nox 2072 max allowed 467
how do I fix this

at 25mph
hc 29 max 45
co 0.49 max 0.53
nox 966 max 754


what could be causing this problem?

any suggestions to fix it

 

Wish I knew, hopefully somebody here can help.

Back when I had my 4age it failed horribly so I took it too the dealership and showed them the slip and they pointed out a few things to do including a new cat and it passed no problem.

 

Replace the cat and try again. After that, maybe an air filter?

 

more info man!!! what's the mileage on your engine? done a major tune lately? correct ignition timing? been playing with the cam timing lately? we don't know how to help you if we don't know the setup of your engine if you don't tell us.

 

hey bro... i failed on the same ****!

i replaced my cat and mine worked but it could also be the main 02 sensor. If you need a working main 02 sensor, let me know i got one for sale

 

Yup, most likely your cat and/or O2 sensor...

http://www.Preciseautocare.com - working at a smog station

 

can a high flow cat work or do i have to get a stock cat

 

If you have any mods, please list them and we can go from there...

 

Is your car throwing any CEL codes?

Have you checked?

Sounds like your EGR system is not working correctly.

Also, Is your timing set to factory spec or is it advanced? Your timing settings could affect NoX.

Even if it is set to stock, you can back it down a few degrees (no more than 3 degrees from stock though) to help reduce NoX.

As others have stated, provide more info including mileage, mods, etc.

 

thank you, for the comments

 

If yours is a 96/97 integra there is a emission warranty extension allows you to get it fixed for free.

 

yeah. please list any mods. i'm interested in knowing more about parts that may cause me to fail smog in the future. thx

 

i know someone who can really help u he's my mechanic and good friend. email him at knmoua@aol.com his name is vinnie.... he can help

 

OK, I changed the cat with a new carsound cat and put in some of that denaturized alcohol, put the timing back 2 degrees, got new plugs

and

you know what, I hate california's smog laws
I passed the nox part with flying colors but

hc and co2 levels went sky high

new numbers are

15mph test
GAS- MAX - MEASURED
HC - 61 - 170
CO - 0.54 - 2.44
NO - 467 - 43

25MPH TEST
HC - 45 134
CO - .53 1.85
NO - 754 32


PLEASE HELP
can i figure this out with out breaking bank

 

anyone else have any ideas

 

hey this is billy, u sent me a message, but i cant respond to you!! but u can call me on my cell phone and i can try to help u. (916) 519-3102. Vinnie's from chico, ca. thanks