Help... failed emissions!!!! high NOX

channer · 11-02-2005, 06:20 PM

Hi All

I need help

... I failed emissions test on high NOX using a TurboTweak 36lb emissions chip!!! FP was set to 38psi off according to Eric's instruction.

driiving 2525 test
HC (llimit - 90) - 81
CO (llimit - 0.50) - 0.03
NOX (llimit - 979) - 1878 <-- failed

curb test
HC (llimit - 300) - 70
CO (llimit - 1.50) - 0.01

I just checked the EGR & Cat and they both functions/looks good. I've got another cat & EGR that I am going to put on.

What else can I check for!!!!! The motor (3000+ km) is slightly modded with ported upper & lower intake, 62mm TB and some headwork.

I don't really want to start swapping parts so any HELP would be greatly appreciated. I am at a loss. PM me if you know of a friend of a friend of a friend

....

thanks in advance.... dave

humberto · 11-02-2005, 07:59 PM

Are you sure that converter is good?Make sure that converter is good and hot before testing car again.

channer · 11-02-2005, 09:22 PM

Humberto...

I took the cat off, and it was not plugged. I could see straight through. I did notice oily toward the bottom.

This is the same cat I used to pass 2 years ago... on a completely stock 180k motor... NOX = 35.

dave

dandman · 11-02-2005, 09:56 PM

hi
if its a stock cat you need, i have mine, yours to use

dan

channer · 11-03-2005, 03:57 PM

dandman... Ken S. suggested putting in the stock cat back in but it's not that easy... I have to change the headers back to stock. Unless someone can fashion a 2 1/2" downpipe to fit my Kennebell headers.

Maybe, I can get some "legit" shop to put the headers back & count it toward my $450 limit.

Does anyone know if I get the $450 repair pass... that I should be OK for future license renewals since it does not have to go through anymore emissions test????

dave

Quick Toy · 11-03-2005, 09:25 PM

Dave
Have you talked to Eric about your results?
I know on the other board, they have a pretty good emissions section, and might be able to give you some tips on how to lower those high NOX #'s without having to do alot of mechanical work. Sometimes gasoline additives can help skew the numbers. Do a search and see if there is one that lowers NOX.

Paul

channer · 11-03-2005, 10:39 PM

HI Paul

I did check with Eric... The EGR setting is enabled. ANd the most probable cause for high NOX is the EGR system. He also said the low BLM should be fine as the computer will adjust accordingly

I haven't had very much response on the TECH forum or the other site. I have been searching both sights trying to figure out what could be wrong with my EGR system. I did find:
- intake gasket blocking EGR ports to the heads
- too low FP will cause car to run rich as it tries to compensate for the low FP. That may be a reason my BLMs were around 112 instead of 128
- ported lower/upper intake causing the front cylinders to run a little dirtier.

I thinking about putting back the stock chips and running just the stock chip. I was going to pull the upper intake and taking a look at the lower intake EGR tower & see if it may be blocked. I was also going to replace the EGR... at which time, I will check to see if there is any blockage to the heads. If this weekend is good... I might switch back to stock headers & DP.

I am at a loss... If anyone else has any suggestions, quick fixes or a "friend of a friend that knows somebody".... let me know.

dave

The Radius Kid · 11-04-2005, 01:25 AM

Try 4 parts gas to 1 part methyl hydrate.
Run the stock chip.
Nice and clean,cool burning.

channer · 11-04-2005, 05:22 PM

Radius Kid...

I was going to swap back to my stock injectors and chip this weekend.... plus a bunch of other stuff... weather pending!!

What and where can I get methyl hydrate?

dave

nevertoold · 11-04-2005, 07:01 PM

Quote:

Originally Posted by channer

Radius Kid...

I was going to swap back to my stock injectors and chip this weekend.... plus a bunch of other stuff... weather pending!!

What and where can I get methyl hydrate?

dave

Methyl hydrate aka gas line antifreeze.
Use plenty like Radius Kid says
I've use it on my last two tests and I pass no problem.

fastbuick · 11-04-2005, 11:46 PM

Dave seems to me your running around confused and going to take your car apart because of emissions.........
First off, you made a mistake going to the gm dealer for an emissions test........why would you go to the most expensive place on the planet to get your car tested?
See the trouble you have to go through now!

Take it to Canadian tire and have it retested with the few tips from the other board (fuel additive).
You seem to make the simplist of things into your own nightmare.

Good luck.

TWIN86GNS · 11-05-2005, 01:29 PM

Dave,

I assume you are getting your 86 T-Type tested? If so why not let it wait until next spring, assuming you don't drive it in the winter? If you left it until next spring the car would be 20 years old and then it wouldn't require an emissions test. Again this is only if you park your car for the winter.

Good luck,

1 RARE T · 11-05-2005, 05:32 PM

Quote:

You seem to make the simplist of things into your own nightmare

I hope you guys are friends because comments like this are not what he's looking for I'm sure.

fastbuick · 11-05-2005, 07:49 PM

Quote:

Originally Posted by 1 RARE T

I hope you guys are friends because comments like this are not what he's looking for I'm sure.

Just relax big guy, i know how sensitive some of you are with your feelings......worse then a depressed women.

I hope my comments did not make you cry.

LOL

shmed · 11-05-2005, 08:07 PM

QUOTE]i know how sensitive some of you are with your feelings......worse then a depressed women. [/quote]

thats funny!!!

good one Mike

11-02-2005, 06:20 PM	#1 (permalink)
channer Registered User Join Date: Mar 2001 Location: Toronto, Ontario, Canada Posts: 411	Help... failed emissions!!!! high NOX Hi All I need help ... I failed emissions test on high NOX using a TurboTweak 36lb emissions chip!!! FP was set to 38psi off according to Eric's instruction. driiving 2525 test HC (llimit - 90) - 81 CO (llimit - 0.50) - 0.03 NOX (llimit - 979) - 1878 <-- failed curb test HC (llimit - 300) - 70 CO (llimit - 1.50) - 0.01 I just checked the EGR & Cat and they both functions/looks good. I've got another cat & EGR that I am going to put on. What else can I check for!!!!! The motor (3000+ km) is slightly modded with ported upper & lower intake, 62mm TB and some headwork. I don't really want to start swapping parts so any HELP would be greatly appreciated. I am at a loss. PM me if you know of a friend of a friend of a friend .... thanks in advance.... dave __________________ 87 GN - stock 86 TTYPE - accident prone 87 Limited - new toy

11-02-2005, 07:59 PM	#2 (permalink)
humberto Registered User Join Date: Jan 2003 Location: ONT MISSISSAUGA Posts: 313	Are you sure that converter is good?Make sure that converter is good and hot before testing car again. __________________ hooker 2.5exust,3"DPw/deltagate,GN1 FT Mount Intercooler,TE61,.63 exaust housing,GN1 aluminum heads T&D 1.65 roller rockers,ATR 214/208 cam,60Zinjectors,Walbro 340,Eric Marshal thumbwheel chip,3500 9x11 stall, ,SMC Kit

11-02-2005, 09:22 PM	#3 (permalink)
channer Registered User Join Date: Mar 2001 Location: Toronto, Ontario, Canada Posts: 411	Humberto... I took the cat off, and it was not plugged. I could see straight through. I did notice oily toward the bottom. This is the same cat I used to pass 2 years ago... on a completely stock 180k motor... NOX = 35. dave __________________ 87 GN - stock 86 TTYPE - accident prone 87 Limited - new toy

11-02-2005, 09:56 PM	#4 (permalink)
dandman Registered User Join Date: Feb 2004 Location: mississauga, ontario, canada Posts: 494	hi if its a stock cat you need, i have mine, yours to use dan __________________ te61, racetronix 65 lbs, smc dual nozzle, thdp, atr 3" duals, double pumper. cottons fm. ported, bigger valve irons , no times, just for giggles! SOLD!, but still lurking!

11-03-2005, 03:57 PM	#5 (permalink)
channer Registered User Join Date: Mar 2001 Location: Toronto, Ontario, Canada Posts: 411	dandman... Ken S. suggested putting in the stock cat back in but it's not that easy... I have to change the headers back to stock. Unless someone can fashion a 2 1/2" downpipe to fit my Kennebell headers. Maybe, I can get some "legit" shop to put the headers back & count it toward my $450 limit. Does anyone know if I get the $450 repair pass... that I should be OK for future license renewals since it does not have to go through anymore emissions test???? dave __________________ 87 GN - stock 86 TTYPE - accident prone 87 Limited - new toy

11-03-2005, 09:25 PM	#6 (permalink)
Quick Toy Registered User Join Date: Oct 2000 Location: Toronto, Canada Posts: 1,388	Dave Have you talked to Eric about your results? I know on the other board, they have a pretty good emissions section, and might be able to give you some tips on how to lower those high NOX #'s without having to do alot of mechanical work. Sometimes gasoline additives can help skew the numbers. Do a search and see if there is one that lowers NOX. Paul __________________ 1972 Toyota Celica with an 87 GN drive train.

11-03-2005, 10:39 PM	#7 (permalink)
channer Registered User Join Date: Mar 2001 Location: Toronto, Ontario, Canada Posts: 411	HI Paul I did check with Eric... The EGR setting is enabled. ANd the most probable cause for high NOX is the EGR system. He also said the low BLM should be fine as the computer will adjust accordingly I haven't had very much response on the TECH forum or the other site. I have been searching both sights trying to figure out what could be wrong with my EGR system. I did find: - intake gasket blocking EGR ports to the heads - too low FP will cause car to run rich as it tries to compensate for the low FP. That may be a reason my BLMs were around 112 instead of 128 - ported lower/upper intake causing the front cylinders to run a little dirtier. I thinking about putting back the stock chips and running just the stock chip. I was going to pull the upper intake and taking a look at the lower intake EGR tower & see if it may be blocked. I was also going to replace the EGR... at which time, I will check to see if there is any blockage to the heads. If this weekend is good... I might switch back to stock headers & DP. I am at a loss... If anyone else has any suggestions, quick fixes or a "friend of a friend that knows somebody".... let me know. dave __________________ 87 GN - stock 86 TTYPE - accident prone 87 Limited - new toy

11-04-2005, 01:25 AM	#8 (permalink)
The Radius Kid Registered User Join Date: May 2001 Location: Stoney Creek,Ontario,Canada Posts: 8,983	Try 4 parts gas to 1 part methyl hydrate. Run the stock chip. Nice and clean,cool burning. __________________ Politics is the art of glad-handing,passionate bllsht and hidden agendas.

11-04-2005, 05:22 PM	#9 (permalink)
channer Registered User Join Date: Mar 2001 Location: Toronto, Ontario, Canada Posts: 411	Radius Kid... I was going to swap back to my stock injectors and chip this weekend.... plus a bunch of other stuff... weather pending!! What and where can I get methyl hydrate? dave __________________ 87 GN - stock 86 TTYPE - accident prone 87 Limited - new toy

11-04-2005, 11:46 PM	#11 (permalink)
fastbuick Registered User Join Date: Feb 2003 Posts: 1,363	Dave seems to me your running around confused and going to take your car apart because of emissions......... First off, you made a mistake going to the gm dealer for an emissions test........why would you go to the most expensive place on the planet to get your car tested? See the trouble you have to go through now! Take it to Canadian tire and have it retested with the few tips from the other board (fuel additive). You seem to make the simplist of things into your own nightmare. Good luck.

11-05-2005, 01:29 PM	#12 (permalink)
TWIN86GNS 2 GN's = No money!! Join Date: Sep 2000 Location: Keswick, Ontario, Canada Posts: 3,167	Dave, I assume you are getting your 86 T-Type tested? If so why not let it wait until next spring, assuming you don't drive it in the winter? If you left it until next spring the car would be 20 years old and then it wouldn't require an emissions test. Again this is only if you park your car for the winter. Good luck, __________________ Paul Beal pbeal@sympatico.ca First official Canadian member of the DSR..... That's just how we roll. 1986 GN # 1 11.38 @ 120.25 mph with 1.501 60' 1986 GN # 2 13.25 @ 102.95 mph with 2.086 60'

11-05-2005, 08:07 PM	#15 (permalink)
shmed just dont stop!! Join Date: Sep 2000 Location: leamington, ontario Posts: 640	QUOTE]i know how sensitive some of you are with your feelings......worse then a depressed women. [/quote] thats funny!!! good one Mike __________________

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