I just need to pass the sniffer test for a few more years but have been toying around with putting a haltech in my vert. So can i get it to control the ACV and the EGR???

 

Im only theorizing here, but i would think its possible to do a "special configuration" with the Haltech that you could some how control the EGR and what ever needs to be in place to pass emissions, but my question would be would it worth all that effort. Another thing is that you could give the guys at RX-7.com (rotary performance) a call, they had a client with a 400HP FD fitted with a Haltech ECU, that actually passed emissions over there, from what i can remember from the Turbo Magazine article they had a high flow performance cat in it but they didnt go into all the details on how they did it. I would have to brush up on EGT and emissions workings on the stock systems to see what could be done, but i dont think there should be that big of a hassle, other than running out of inputs and outputs, specially with the E6X, i would think that to do this the right way you'd be better off with an E11v2, or E8 at the very least.

Im guessing that maybe on an FD you could leave the stock ECU in place and do a piggy back install of the haltech, that way the stock ECU could still have control over the emissions equipment in the engine, and installing a high flow cat would also help to make it breath better as well as make good power.

Thats my 2 cents.

 

Any properly tuned haltech will pass the sniffer.. Ive done it 2 years in a row and counting.

Rat

 

Question, did you retain the EGR valve and pollution pump aparatus?? Because from my experiences with the sniffer, ive seen that if the EGR is malfunctioning this puts excesive NOX content in the exahust and this is what makes you fail it.

 

Nope, no EGR to speak of. Air pump and ACV were installed.

 

Whats the AVR? is it the same as the EGR? or is it another valve? can you tell me what you did with that setup? what the car had installed on it to pass the sniffer? and what was the tune like?

 

ACV=the valve that puts air into the cat converter, and other things.

I kinda fingured that i could do it just the ACV being controled by the Haltech. And maybe the EGR (not that it is used much in the FC). My state is not too bad (in the 3 counties that have smog test) as long as it passes its fine. They only do visual if it fails and you try to get a waiver. My 91 vert has NEVER passed. 3 times now and it always fails. My Turbo II passed with flying colors after I put a bonez hi flow into my RB Turbo Back set up. But the bone stoke vert fails every time.

so ACV is a definatly doable. The egr probably not needed.. Anything else that i would need to worry about. AWS donsnt matter jack for the test, or anything else. Purge Control Valve maybe?? But then again if just the ACV does it i guess nothing else really matters now does it?

My thoughts for doing this are because i was going to, eventially, to a turbo swap or maybe a blower. I figured that if I had all of this done before hand would cure some problems now, and make the engine or blower add on a lot less painful.

That and It would be fun.

 

See this is what strikes me as strange, i was working on a 93 Lexus SC300 that wasnt passing smog (the sniffer), it had the check engine light on and when i diagnosed the fault code, it indicated an EGR Malfunction, this meant that NOX gases were getting into the exhaust flow and were picked up by the measuring equipment at the smog testing place. The car was actually registrating a good mixture on the O2 side, since the CAT was still working and since the O2 sensor was good too the ECU regulated the mixtures accordingly. But!, the NOX gases in the exhaust is what were making the car fail the test, and you cant clean up the NOX gases with just a CAT, you need to recycle some of the exhaust flow through the EGR (or what ever valve puts that flow) back into the intake so it gets burnt off again.

So, my guess is that apparently even with one valve doing this recycling, EGR, AVR, Recirculation Pump, would be necesary for cleaning up the pollution? Or they dont measure NOX gases in your neck of the woods?

 

Can I borrow your map?

As a matter of fact, I will buy it from you!! I got my FC to pass, but I had to dump a whole lot of denaturated alcohol in order to pass; my EFI\tuner skills sucks!!

BTW - What cat are you using?

 

OK im no emisions expert - BUT if you just want to pass an emisions test it would be easier to pass without the EGR, without the PCV and without any air recirculating valves wouldnt it? Vent everything to atmosphere in the engine bay, the sniffer picks us clean exhaust emmisions and viola your done....if your really worry why not even more dodgey and setup a water bottle to feed abit of hydrogen peroxide (15% with water should be good) into the intake to clean things up as well.....sniffer tests can be fooled quite easily im sure !!!

 

Hey nice one! i gotta write that down!

 

All I did was use a stock Mazda cat. I hollowed out an ACV so the Air Pump would pump air into the cat, and I used my emissions map. If I can find that map, you are more then welcome to it.

Rat

 

I think thats my problem, the cat...


I am using a 3 inch free flow cat (dynomax I think), the exhaust tone is luder when using the cat than when using the pre silencer

Hit me up if you find it

 

Im curious, what kind of AFRs did you run with that map?

 

bout mid 13s...

 

Ok. I am really interested in this thread. Should have not started my own

Anyhow I would be interested to see this map of yours. (Just ignition) Right now my 91 Octane map is tuned to run 14.8 to 15 a/f. guess this is not to good. O and this is a haltech e6K.

I was thinking of running a 4" cat converter with an electric air pump. ALso add some alcohol to the tank. Just not sure what is safe.

So I should be good then

I wish I could find a place that would allow me to hook up to the sniffer and play with the a/f and timing.

I've never heard of running hydrogen peroxide in it. Sounds dangerous to the engine.

 

Download any of the stock maps on the MAPs thread, the ignition on those maps is pretty conservative, and just tune the entire map for AFR's of 13.5-14.0. With a good perofrmance CAT you should be able to pass emisions. What my argument was in the thread as well, is that a car without an EGR valve of some sort (and/or a recirculation system of some kind) will pass one part of the sniffer test, but not the NOX emissions, which is what the EGR valves and recirculation systems clean up by putting some of the exahust and blow by air from the engine back into the intake. Also, this was in California, so, i dontk now what other states have as rules.

But, there are some guys here that probably know more than me about these things so maybe im full of S#$%, but since i did work on a car that was completely stock, with a functioning CAT and O2 sensor, with a faulty EGR valve that didnt pass the NOX emissions tests.

But, like i say, i dont know everything. (yet )

 

Not all Rx7s have EGR, of the FC's its only the series 4 cars.

I have never had a problem getting an Rx7 to pass the sniffer, the visual is another story. A horribly rich car, running so rich it barly runs will pass the sniffer with 2-3 brand new cheap universal cats inline, with an airpump plumbed directly to the first cat in the series. The cats will heat up redhot, and if anything is touching them it will start on fire. I did this once on a gslse, the smog shop dude mentioned he had never seen a car run so bad. Hook the airpump airline up in the shops parking lot, and disconect it before driving home, any load makes them get even hotter. On the smog dyno it was ok, when driving home the exhaust overheat came on.

 

I cant agree with these kinds of proceedures you guys talk about, that isnt passing the test, that is cheating the sniffer test. Lets talk fact here, how to do it properly, because i highly doubt that just running 14's will make an RX-7 pass, UNLESS?!? the fact that the rotary tends to have lower NOX emissions than regular motors?? i think ive read something about that somewhere??

 

whats wrong with cheating. Just having a haltech on your car is illegal in CA, the last time I had to smog I bribed the atendant 200 dollars and the car didn't even go on the dyno.

 

Jajajaja, that is true and funny. I dont think we should mention these things though. :P

At anyrate, if the option exists to "work around it", then ok.

 

I would like to pass it legally regardless of the illegal haltech!



If I cannot, what a waste of time and money in this car......

 

Good modern cats, an air pump of some sort and reasonable A/F ratios will get you past smog. If you do run with cats they will need to be replaced every 2-3 years, but they are cheap enough, so I guess it doesn't matter.

 

Thats what kills me about Kalifornia you could get your car running WAY cleaner with a haltech low co2 low co low nox etc BUT it would still be illegal because of the fact it doesnt have a CARB sticker.

******* communists down there **** me off

 

I've read that california onyl has 91 octane gas, not 93? when i was there in october and filled up my rental, for the life of me i cant remember if there was 93 oct or not.