[ToyvoJZ]

My 1JZ failed emissions for the second time in NJ. Here are the readings.

1st inspection.
NOx - 2437 - need to be 1146 or lower
HC - 190 - need to be 152 or lower
CO% - .81 need to be .86 (PASS)

I changed the Cat converter, put new plugs in and leaned out the GCC up to 3500RPM and took the car back to inspection. (the car has the FCon, GCC, 440's, the 2J map sensor and a single turbo set-up)

Here are the second readings:
NOx - 1455
HC - 144 PASS
CO% - .73 PASS

What else can I do to bring the NOx reading below 1146 without affecting the other readings negatively?

 

[Rising_sun]

What type of cat are you using?

 

[ToyvoJZ]

dynomax

 

[TsopranoIS300]

why not just find a gas station to pass you??

 

[Arizona]

Where in Jersey you located?

 

[di_rosa]

you only failed on nox, that's good. nox is your exhaust gas temperatures. you can drop them by running high octane gas, and if you can, retard you timing about 5 degrees.

 

[ToyvoJZ]

I am in Piscataway.

 

[Arizona]

too far for me to help you out.

 

[Pete_Howard]

i think NOX is directly related to EGR, and 1Js do not have provisions built in the head for EGR.

 

[Marotta1]

Get yourself some ethyl alcohol and dump it in your tank. This is ethanol. You could even buy 70% ethyl rubbing alcohol(which is about 30% water). It will raise your octane, cause your motor to run cooler, and should lower egt's and therefore nox. And alcohol runs much cleaner than gas. It will lean out your mixture a little depending on how much you use.

You may just want to run it a while first cause it will probably clean some gunk out of your engine if you use enough. You don't want that at the emissions testing station obviously.

 

[airbats801]

5 gallons of 110 and a gallon of 99.8%+alcohol, passed 2 cars here in oregon with no cats or emissions equipment on. It works wonders. egr was also disabled. Ran cleaner than my friends 850 volvo turbo wagon

 

[nycressida]

just tell the guy doing the inspection to pass you and youll pay him extra.

 

[slidingsidewayz]

5 gallons of 110 and a gallon of 99.8%+alcohol, passed 2 cars here in oregon with no cats or emissions equipment on. It works wonders. egr was also disabled. Ran cleaner than my friends 850 volvo turbo wagon

so its really possible to pass a smog check w/ that set up. my buddy told me about doing something like that w/ no cat and it'll pass, but i didn't believe him

 

[airbats801]

so its really possible to pass a smog check w/ that set up. my buddy told me about doing something like that w/ no cat and it'll pass, but i didn't believe him

My friend has passed 2 starions with this setup. Turbo back 3 inch exhaust, straight through, all emissions removed off the car, egr eliminated etc.. I believe he also retarded his timing a few degrees.

 

[Clint G]

try putting a stock cat in, a aftermarket cat wont help you and maybe the stock one will...

 

[ZaZZn]

NOX is high because you need EGR thats why.

I could never pass with out EGR... it's VERY hard.

 

[di_rosa]

my 7m with 720's and sp61 passed with no problem with no egr...........though, i was able to retard my timing

 

[Evilempire1.3JZ-GTE]

:nutkickhi

Freekin this mother f'n smog crap is pissing me way the F off. ok you wanna know how to get around this here easy!

simple barrow a friends supra same year make aproximatly swap vins and tags then re rivet every thing back when done for crying out load this smog crap sucks and i live in Ca and make sure the friends car is one of those sucky 7m n/a engines that will pass its good even to have friends in lower places.

 

[joey_daze]

:nutkickhi

Freekin this mother f'n smog crap is pissing me way the F off. ok you wanna know how to get around this here easy!

simple barrow a friends supra same year make aproximatly swap vins and tags then re rivet every thing back when done for crying out load this smog crap sucks and i live in Ca and make sure the friends car is one of those sucky 7m n/a engines that will pass its good even to have friends in lower places.

This 1j is in a Volvo...

 

[Wreckless]

I'll also vouch for good gas + ethyl alcohol combo. Drive it empty and then put ~4 gallons of 101 and a half to a full gallon of rubbing alcohol and it'll pass with flying colors, no cats or anything.