Emissions Time

[FabzDSM]

I am due for emissions, wish me luck guys. I have tuned using dsm link, I got pretty much all my fuel trims in order. Has a brand new o2 sensor, running pure e85, stock boost and a high gap for my ngk 6es. Hopefully I'm not too low :confused:.....Anyways will post results asap tomorrow.

[thiazole]

Let us know if you don't pass. I have some ideas will help.

[CBR600RR]

Yeah, i would like to see your results. its about that time for me to. And mine is a fresh build with the link and all emissions stuff removed.
Thiazole what are your ideas that would help. im sure i will need them

[FabzDSM]

Ok so the first time my hydro carbons were 1.73 and my NOx were 6.8 I failed pretty bad on both those levels but considering I have a fake cat it was ok. I went to the garage I cracked open the down pipe, put all timing adjustments in link to 0, and went in for my second test. Passed my hydros, cos, but yet again my NOx failed with a 5.2. Keep in mind the limit is 3.5. Thiazole lets here those ideas, Im going back tomorrow and need some HELP!

Results of second test:

HC: 1.35 Limit :1.5
CO: 18.67 Limit : 20.0
NOx: 5.2 Limit: 3.5

[thiazole]

I've never seen anyone fail the NOx test before. The only thing you need to do is pop the wastegate actuator arm off the turbo, and I bet you pass. Your NOx should plummet, but if either your HC's or CO doesn't pass, then you'll need to lean your fuel sliders a bit (just move it back before you put your actuator arm back on).

The biggest problem I see with turbo cars is that they are tuned much richer than N/A cars to keep the exhaust temps down. This causes CO and HCs to rise quite a bit making it hard to pass unless you have the stock converter. If you just lean it out, you'll pass HC and CO, but you'll fail NOx, since the exhaust gets so much hotter on a turbo car. A lot of people remove the wastegate actuator arm, which is the first step, but they don't readjust the a/f to what a normal N/A car would have, so the only thing that drops is the NOx level. What you need to do is pop the actuator arm off and adjust the a/f ratio to a nice 13 or even 13.5:1 WOT like an N/A car. With the advent of DSMLink and readily available WB units, we should all be able to pass fairly easily.

[thiazole]

Water injection will reduce NOx a lot too.

[sbiggi]

Put a cat in and you'll pass.

[FabzDSM]

I put a stock exhaust on, it was a pain in the azzzz..... Hopefully now i'll pass

[thiazole]

If you have the stock cat on there, you'll pass with flying colors. I bet it will reduce everything to 1/10 or maybe even less.

[FabzDSM]

If you have the stock cat on there, you'll pass with flying colors. I bet it will reduce everything to 1/10 or maybe even less.

I hope, I also left the downpipe loose. So hopefully yes. I will let you guys know tomorrow. I am also jumping my temp sensor because it got so hott when they were doing it, over 230*.

[rodent]

On my stock 95 and 99, I made sure the wastegate arm was open all the way and ran no boost. Passed with flying colors. When WG connected, it would fail.

IMO, zero boost = passing emissions

[FabzDSM]

Well if it doesn't work I get a free one again. I will disconnect the arm for sure then. Right now it is at stock boost.

[Wazzelby]

I finally passed after my fiasco a couple of weeks ago. I"m running straight E85, and left my wastegate arm attached (I was on my way home from work and figured I'd give it a shot). The only thing that was slightly elevated was my NOX. everything else was at or below .05!! It took three different drivers to figure out how to drive an act 2600...tards....
Anyway, I left the wastegate arm on, added some timing at about 4000RPM up (about 3 degrees), made sure I was at about 15.0 at idle and cruise (no boost) and tuned it to drop to about 12.2 at WOT (23PSI).
The guy who finally drove it said he thought it would fail cause he kept ending up in boost, he was really surprised when he saw the numbers!!

[FabzDSM]

its like awaiting an hiv test lol.

[thiazole]

I finally passed after my fiasco a couple of weeks ago. I"m running straight E85, and left my wastegate arm attached (I was on my way home from work and figured I'd give it a shot). The only thing that was slightly elevated was my NOX. everything else was at or below .05!! It took three different drivers to figure out how to drive an act 2600...tards....
Anyway, I left the wastegate arm on, added some timing at about 4000RPM up (about 3 degrees), made sure I was at about 15.0 at idle and cruise (no boost) and tuned it to drop to about 12.2 at WOT (23PSI).
The guy who finally drove it said he thought it would fail cause he kept ending up in boost, he was really surprised when he saw the numbers!!

Nice! That is VERY encouraging for the rest of us. Didn't you have troubles passing last time, or am I thinking of someone else? Also, are you going to switch back to pump now or are you hooked on E85?

[FabzDSM]

I passed as well. My NOx was still high at 3.24 but was under the 3.5 spec. Took that stock exhaust off and am throwing my straight pipe back on. 2 more years of emission free.

[CBR600RR]

Good job on passing. But i was reading over some of these ideas, and well this wastegate idea would not help me one bit. Im running externialy gated. But on the other hand i do have a 3inch cat on the car and run around 14.7 at idle and cruse. i hope thats enough for me to pass

[Wazzelby]

Nice! That is VERY encouraging for the rest of us. Didn't you have troubles passing last time, or am I thinking of someone else? Also, are you going to switch back to pump now or are you hooked on E85?

I did have trouble passing last time as well. I was ont eh stroker then with the holset HX40. I HAD to disconnect the wastegate cause they kept on getting into boost and almost jumping the rollers!!
I think I'm gonna stick with E85 for a while! I'm kinda hooked on the stuff now! I've actually decided to tear the car apart this winter and do a full rebuild.. Head, full garett turbo, re-do the bottom end and suspension and add a cage. I think this will be the last year for this to be a street only car.
As for "CBR600RR", you can try just disconnecting the vacuum line to the wastegate and just running spring pressure?

[Toybreaker]

As for "CBR600RR", you can try just disconnecting the vacuum line to the wastegate and just running spring pressure?

Allen, I think we know what you meant, but I think you missed a word or two.

You mean to take the boost control solenoid or manual boost controller out of the loop, and run on straight wastegate spring pressure.

To do that, you want the waste gate line connected directly to the compressor discharge area to get the 'gate to run on teh spring.

Disconnecting the wastegate reference line altogether will boost things the moon. :eek:

(The test driver would probably poop themselves on unlimited boost :p )

[sbiggi]

I dont know why so many of you have a hard time passing, other then thinking you'll do it with out a cat.

[CBR600RR]

Well i am going to run the car with a cat, and i think i might throw a gallon or two of E85 in to help out

[rodent]

Good job on passing. But i was reading over some of these ideas, and well this wastegate idea would not help me one bit. Im running externialy gated. But on the other hand i do have a 3inch cat on the car and run around 14.7 at idle and cruse. i hope thats enough for me to pass

Couldn't you use a small tank of compressed air and regulate it to 20 psi (or whatever psi) so your ext. WG is always open? They never look in the trunk. Another option is to get a cheap ebay WG and gut it so its always open. Replace it with that when you do the e-test.

[thiazole]

I dont know why so many of you have a hard time passing, other then thinking you'll do it with out a cat.

I also think some high flow cats don't work very well until they get hot. It is especially true when you have to wait in line for 20 minutes with the car sitting and cooling off.

[sbiggi]

I also think some high flow cats don't work very well until they get hot. It is especially true when you have to wait in line for 20 minutes with the car sitting and cooling off.

Could be. Never had a issue with mine.

[thiazole]

Good job on passing. But i was reading over some of these ideas, and well this wastegate idea would not help me one bit. Im running externialy gated. But on the other hand i do have a 3inch cat on the car and run around 14.7 at idle and cruse. i hope thats enough for me to pass

I'm not sure if you have your wastegate on the manifold or the O2 housing, but if you have it on the O2 housing, you can just swap your housing out for the stock housing and it will be just like running an internal wastegate wide open.

[Kibo]

I've passed just fine without a cat (gutted by previous owner) as did Plesko with his GVR-4. Tuning for emissions requires a different way of thinking than tuning for power.

[prophecymiller]

I recently tried to pass emissions with an exhaust leak between the manifold and turbo. I figured it's worth a try before I tear it down to seal it up...in the emissions parking lot, I bumped up the global in dsmlink a couple percent to help get the fuel completely burned by the time it comes out of the cat. Well, this did help with making almost no emissions except for nox levels- they were really high...but I did have a couple gallons of e85 in the tank which may have played a part. Either way, I failed for the nox and also because my gas cap was leaky:p

[FabzDSM]

Freaking gas cap, lol. Yeah I had to loosen the stock exhaust so there was still a leak just in case that cat didn't function right. I was not gonna spend another $25. Yeah the aurora emission off of peoria and 30th had me wating in the line for about 35 min. It sucked but im free for two years ahhhhhh. Ive never been so proud of an 09 sticker.

[CBR600RR]

Just an update, i finaly went in for emissions on my car and couldn't belive it when i passed with no problem, i actully fast passed. this is with everything in my signiture and ALL emissions stuff removed except the racing cat.


HC .4 limit 1.5
CO 4.7 Limit 20.00
NOX .6 Limit 3.5

[derekvr4]

so i went in today for a retest and failed big time- I turned down the boost and turned down my base fuel pressure to 28 PSI and used 85 octane gas and drove the car for 45 minutes before the test to warm up the cat,these were my readings- HC PPM @ 2500 RPM = 706.2 and at idle = 352.9. The limit is 220. What can I do now? my first test with 91oct and 10psi and fpr @45 was hc ppm 303@2500rpm, i did the idle test both times....

[FabzDSM]

Go cold, don't let it warm up, what plugs are in there? Any boost leaks? Drop the downpipe if you have to enough for a leak to be felt but not known.

[sbiggi]

so i went in today for a retest and failed big time- I turned down the boost and turned down my base fuel pressure to 28 PSI and used 85 octane gas and drove the car for 45 minutes before the test to warm up the cat,these were my readings- HC PPM @ 2500 RPM = 706.2 and at idle = 352.9. The limit is 220. What can I do now? my first test with 91oct and 10psi and fpr @45 was hc ppm 303@2500rpm, i did the idle test both times....

Sounds like your o2 is dead. Either that or you tune sucks so bad that the ecu cant pull enough fuel in open loop to compensate.

[thiazole]

so i went in today for a retest and failed big time- I turned down the boost and turned down my base fuel pressure to 28 PSI and used 85 octane gas and drove the car for 45 minutes before the test to warm up the cat,these were my readings- HC PPM @ 2500 RPM = 706.2 and at idle = 352.9. The limit is 220. What can I do now? my first test with 91oct and 10psi and fpr @45 was hc ppm 303@2500rpm, i did the idle test both times....

If all they are doing is a steady rpm sniff test, then why would your boost level matter?

I agree with Seth - it is most likely the O2 sensor.

Do you have a list of mods done to your car?

[derekvr4]

iv got a 92 galant vr4 with b16g, keydiver chip, 550rc's,warlbro 255,fmic,afpr, iv got a safc on the way and i dont have a logger or dont know anyone who has one iv just moved here!