failed echeck today high NOx - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > failed echeck today high NOx

Brand New! Quadratec LED Headlights!FS: Wrangler RGB Multicolor Fog Light LEDs: Awesome EffectFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye Kit

Reply
Unread 03-10-2014, 05:23 PM   #1
langwilliams
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2014
Location: Lorain, Ohio
Posts: 242
failed echeck today high NOx

I failed echeck today in Ohio. NOx was just a little high, all other numbers passed. I just bought this 95 4.0 auto wrangler an have only driven it about 10 miles total before taking taking it in for testing. Had trouble getting a top for it, got that done today. any chance that driving it an running some injector cleaner through it will help? I read you can cheat a little by retarding the timing. I have a timing light from my 5.0 days just need to know how the jeep works (do you have to unplug anything before, etc). any info appreciated!

langwilliams is offline   Reply With Quote
Unread 03-10-2014, 07:17 PM   #2
Mark05059
Registered User
1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,302
your engine timing is controlled by the computer so that isnt going to work...
__________________
1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
Mark05059 is offline   Reply With Quote
Unread 03-10-2014, 07:33 PM   #3
langwilliams
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2014
Location: Lorain, Ohio
Posts: 242
on the 5.0's you could pull a plug, set the base then the computer timed it off that base
langwilliams is offline   Reply With Quote
Unread 03-10-2014, 08:27 PM   #4
AmmitOsiris
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2011
Location: Brentwood, California
Posts: 3,293
[QUOTE="langwilliams"]on the 5.0's you could pull a plug, set the base then the computer timed it off that base[/QUOTEthats how my 4.2 works let me consult my manual and get back

1 WEEK TIL ST. PATTY'S DAY
AmmitOsiris is offline   Reply With Quote
Unread 03-11-2014, 05:23 AM   #5
Why J?
Registered User
1993 YJ Wrangler 
 
Join Date: Sep 2004
Location: Knoxville Tn
Posts: 3,437
I your EGR hooked up? The EGR reduces NOX, verify that it is working properly.

Edit: sorry no EGR on your year. Brains not working yet this morning with the time change.
__________________
New Project "Pissed Wife"

http://www.jeepforum.com/forum/f22/project-pissed-wife-747535/
Phase II 5.3L/4L60e then NV3550
http://www.jeepforum.com/forum/f22/p...stall-1400506/
Why J? is offline   Reply With Quote
Unread 03-11-2014, 06:46 AM   #6
Mr.B
Wot's...uh The Deal?
 
Mr.B's Avatar
1994 YJ Wrangler 
 
Join Date: Nov 2005
Location: Roseville, Ca.
Posts: 3,274
I didn't know we had EGR's. You should drive it until the cat gets up to temp. That's when it the most efficient. But if you really want to pass smog, replace the cat.
__________________
.
White '94 YJ 2.5L 5 speed, 35" BFGs KM2's, 5" lift, Mark VII 2 speed fan, Milemarker PE8000, Front Aussie Locker, Power steering conversion, '98 Cavalier seats, MORE Boomerangs in front, 136 amp ZJ alternator, JB conversions SYE, Tom Woods custom drive shaft, 8.8 with ARB, 4.88 gear ratio, Teralow

My Jeep

'89 XJ Laredo Bone Stock

Member:The Wrecking Crew

Ham license:
KB6(tooeasytosearch)

Everyone is Welcome
www.rubiconramblers.com

Quote:
Originally Posted by Major Sanderson
You have no respect for excessive authority or obsolete traditions. You're dangerous and depraved, and you ought to be taken outside and shot!
Quote:
Originally Posted by Beefstew
I may have proven that I am in fact an idiot, by all of your standards...
Quote:
Originally Posted by ritjobbie View Post
Mr.B's post gets you as close to Buddha as you can get on JF...
Mr.B is online now   Reply With Quote
Unread 03-11-2014, 07:36 AM   #7
Why J?
Registered User
1993 YJ Wrangler 
 
Join Date: Sep 2004
Location: Knoxville Tn
Posts: 3,437
Quote:
Originally Posted by Mr.B View Post
I didn't know we had EGR's. You should drive it until the cat gets up to temp. That's when it the most efficient. But if you really want to pass smog, replace the cat.
Your right, I was mistaken.
__________________
New Project "Pissed Wife"

http://www.jeepforum.com/forum/showthread.php?t=747535
Phase II 5.3L/4L60e then NV3550
http://www.jeepforum.com/forum/f22/p...stall-1400506/
Why J? is offline   Reply With Quote
Unread 03-11-2014, 07:37 AM   #8
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,806
No egr on the 91-95. If you are running high nox it is usually related to the cat. Alcohol additive or a few gallons of E85 will probably get you through if it is real marignal.
Que89YJ is offline   Reply With Quote
Unread 03-11-2014, 08:51 PM   #9
langwilliams
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2014
Location: Lorain, Ohio
Posts: 242
it's not over by much. standard is like 1050 an I'm at 1115ish. there's some sort of vac lines coming off the rear of the valve cover that the PO stuck in there an taped in place, could this be a little vac leak?
langwilliams is offline   Reply With Quote
Unread 03-12-2014, 08:11 AM   #10
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,806
Try the alcohol, ethanol. You will need to replace the cat sooner or later.
Que89YJ is offline   Reply With Quote
Unread 03-12-2014, 03:41 PM   #11
langwilliams
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2014
Location: Lorain, Ohio
Posts: 242
Que I get the feeling you're right, hoping to pass it now an not have to deal with it for another 2 years an use that money to fix some other issues I found with it. thanks.
langwilliams is offline   Reply With Quote
Unread 03-12-2014, 06:16 PM   #12
82gt
Registered User
1991 YJ Wrangler 
 
Join Date: Feb 2014
Location: Long Island, NY
Posts: 16
I was able to induce a small vacuum leak, but finally replaced the cat and have been groovy ever since
82gt is offline   Reply With Quote
Unread 03-12-2014, 09:03 PM   #13
Ron_K
Registered User
1991 YJ Wrangler 
 
Join Date: Dec 2008
Location: Irving, Texas
Posts: 160
Quote:
Originally Posted by Que89YJ View Post
No egr on the 91-95. If you are running high nox it is usually related to the cat. Alcohol additive or a few gallons of E85 will probably get you through if it is real marignal.
Exactly what I had to do, replaced my cat with a cheap universal from Oriellys and problem solved.
I just cut the Flange off my OEM one (catalytic convertor), and welded it onto the new one after measuring.
__________________
"You're only Limited by Your Own mind."
91 YJ, rear body armor with rock rails and TJ filler conversion. LED Tail lights. 33 x 15.50 x 15 SS TSL SX's on black steelies. Home made Bumpers and swing out tire carrier. MileMarker H9000 Winch, H/T & Bikini Top, full doors & half doors. ~RIP~ C.D.K. 11-11-08 (miss you baby)
NTM 1989 XJ 2 Door Cherokee Sport, I6/auto/Swingout carrier, Custom Stereo system that makes my heart skip a beat.. IT'S My New DD and da^% happy to say I finally own one ;)
Ron_K is offline   Reply With Quote
Unread 03-12-2014, 09:05 PM   #14
langwilliams
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2014
Location: Lorain, Ohio
Posts: 242
I'm going to try some alcohol in 93 oct gas in hopes of sneaking thru an replace the cat before it needs tested again in 2 years
langwilliams is offline   Reply With Quote
Unread 03-13-2014, 01:10 AM   #15
carnuck
Registered User
1984 J-Series Truck 
 
Join Date: Nov 2004
Posts: 3,213
If not, one heat range colder plug works too. You may have the high altitude CPS (on the bell housing) which is advanced slightly. More timing advance = more NOx.
__________________
"Usually found in a Jeep near Reiter, WA"
FOR SALE STUFF
http://tinyurl.com/jimsclads

'81 Eagle wagon with upgrades $2500
'87 Comanche shortbox 4.0/AW4/NP242 on 33" tires $3500
carnuck is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.