viper_u27

Well, as the title says, i just got my notice to get my emissions done, but wanted to see if there are any tips or tricks you guys use to pass the test.

I am running my twins non-sequential with a microtech and do not have an airpump, though visual inspections are not a factor here in IL.

I was thinking of putting on my stock-cat on (has full exauhst now) and setting the boost controller to 0 so it wont boost at all during the actual test. what do you guys think? thanks ahead of time for the responses...

scotty305

iTrader: (2)

Change your oil and plugs and pcv valve, and there's some air chamber to clean out also. Go there with your cat converter very warm. The West coast section has a big thread on passing California emissions testing:
https://www.rx7club.com/showthread.php?t=247935

-s-

rynberg

You will need an air pump hooked up and functioning to pass with a stock cat, if your emissions requirements are any where near to Cali's.

FDNewbie

iTrader: (10)

If I understand correctly, the minimum boost you can make is 7 psi, as that's what the stock wastegate is set at (am I right Rynberg?)

rynberg

Yep.

The tester shouldn't be going into boost anyway. If they do, you'll fail no matter what.

tt2323

airpump or no pass

cthomp21

You'll definately need the airpump and stock cat. Change the plugs and oil.

Talk with the tester about keeping the RPM below 3,000 and out of boost or you'll fail for sure. There's also the gallon of alcohol trick in 1/4 tank of gas.

Good luck! I'll be trying to get my car through the farking IL rolling dyno test in the next coupla weeks. I've already failed twice due to the same moron driving my car like a total dipshit.

seoulfulracing

Doesn't matter if you set your boost at 7psi or 30psi
they only test under 3000-4000rpm where you are not even boosting

I failed my emission big time but I am going to try it again with new sparks and oils soon.

cthomp21

IL has a rolling dyno test which simulates a driving cycle through the city. Pass or fail has a great deal to do with how the tester drives the car.

rynberg

You can make boost at 2500 rpm....

Besides, every state has different testing methods. Cali's tests are much different than your state's.

I don't know changing the oil could possible effect emissions levels....you need four things to pass emissions testing:

1. a stock or hi-flow cat
2. a working air pump hooked up to the cat
3. a decently running engine
4. an emissions tester who's not a boosting tool

BlueRex

Most pull a vac line just to make sure the test never sees positive boost.

I'm not positive it does, but I've heard it mentioned often enough that I did it after failing my initial test.

My formula for passing smog was:

1. new plugs
2. new oil
3. gallon of denatured alcohol
4. capped off pcv line
5. new (actually used) low mileage catalytic converter
6. loose y-pipe coupler to prevent boost

My car was running so clean I was quick passed, meaning they only took a small emissions sample and determined I would pass.

FDNewbie

iTrader: (10)

Ooohhh...I like that idea!

rynberg

I really don't see what the big deal is....

From my last smog test, I was at the minimums in all emissions categories. All I did was drive on the highway for a few minutes and pulled into the smog shop. Done.

Relevant emissions-related mods at the time were PFS intake/SMIC, downpipe, stock cat and stock ecu.

I cannot think of a single vacuum line that would prevent the car from making boost on the PRIMARY turbo. Even if there was, hearing a big whoosh of air from underhood might make the inspector curious, which is the LAST thing you want...

BlueRex

This is another thing I've read, but haven't done. When I was going through my quest to pass emissions I read a few methods for preventing the tech from boosting during the test and this was one of the repeated ideas. As mentioned above I went with the loose y-pipe coupler.

FDNewbie

iTrader: (10)

Hey Jason...I think I found the method you were referring to:

It's post #18 from this thread: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/air-pump-changing-cat-434707/

BlueRex

As I said, it's mentioned in a lot of threads concerning emissions, but I myself have never attempted it. I just loosened the y-pipe coupler, but it seemed to have been unnecessary since the tech took it real easy on the car while he was testing it.

EDIT: The thread you linked describes a different method to achieve the same effect.

irozendaal

My formula for passing smog was:

1. new plugs
2. new oil
3. gallon of denatured alcohol
4. capped off pcv line
5. new (actually used) low mileage catalytic converter
6. loose y-pipe coupler to prevent boost


With the "denatured Alcohol" do just pour that into my gas? what ratio? Sorry if this sounds stupid... i just have one chance to pass this emissions test or supposedly the city will fix the problem for me... i already failed once... this is my second attempt.... 88 rx7 gxl

BlueRex

IIRC you want a 25% ratio (that is 1 gallon of DA for 3 gallons of gas). I ended up running the tank down to a quarter and poured in the DA, so my percentage was probably less then 25% but still did the trick. If you do some searching on this subject you will find different methods for using DA and passing emmissions discussed.

jeff36

I failed my test 2 times this summer. I passed no problem 2 years ago. Same car, same mods.

mecman

iTrader: (11)

I failed two times. I had to do new plugs, new cat (hi-flow), working air pump, down pipe, stock cat back, stock ECU, 1 gallon of denatured alcohol in a 1/4 tank of gas. They will go to boost at 3-4K. I watched in the drivers seat during the test.

RX7Wishing

areyou ******* serious!!?!? The city will fix it for you?!?!? **** that. (unless they are flipping the bill). Thats BS bro. They local gov should never get involved with how you fix your own ****. They should just keep failing you if you dont pass... GRRRR that **** ****'s me off. Im so glad i dont get smogged here.

fdeeznutz

denatured alcohol did the trick for me. Just make sure to get ALL of the alcohol out before you start boosting again.

Compilez

iTrader: (3)

It'd be interesting to see how they will go about doing that... (How they plan on taking your car, what they will do to fix it, and are they paying for the bill)

PandazRx-7

iTrader: (18)

Yeah, we tried both ways, without the blow-off valve hose pinched the rpm/speed kept fluctuating up and down during the whole test. Also, here in Cali, there is a part of the test where they need to speed up from 15mph to 25mph within a few seconds, this is where most will boost and fail.

Btw, I tried with both PFC and Stock ECU, both where doing well, except the PFC kept on turning off the airpump too early causing the #'s to spike all of a sudden. Although I did not have the airpump hooked up to my cat, I suspect it needs to function for the ACV.

kuroi FD

Isnt there something about leaning out the engine and it runs clean? Although this would be dangerous, if the bastard blows your engine on acceleration it would be on his *** right?