Another Yj failing Nj emissions

Shamrock84 · 08-10-2010, 08:47 PM

nj got rid of all mech/safety inspections but still need emissions.

Took my 88 YJ in to the state inspection facility in flemington (run by Parsons) and noticed they still measured door height and i realized and confirmed after searching that we still have High Rise req's. FYI lol

Anyway i failed and would appreciate some advice. YJ has 4.2L and new AX-15 . Engine has 160,000 mi, was rebuilt some time and miles ago. Upon my buying YJ i have installed WEBER 34 DGEC, have holley FPR and gauge dialed to a hair over 3.5 PSI, NUTTERED it, TR'ed it, installed the regular autolite's gapped to 0.045", wires new hi performance from Napa. (thermostat is a 180 or 190 how much would the ten - 20* hotter stock one help emissions?) All or most of these upgrades have been completed less than 7,000 mi ago. Timing is set to around 8* BTDC, idle speed set to around 950 RPM and cat has been replaced by PO some time ago and seems to work well judging by its red hot glow.

Got the jeep hot as it is a long drive out there and had put some iso-heet (drygas/isoprophyll alcohol). Jeep has been running very good since upgrades. BUT...lol i still failed

IDLE failed for HC ppm 330 (accept: 220) and CO% 9.43 (accept:1.20) extra info CO2% = 9.0 (ok) and O2% = 0.5
HIGH IDLE passed HC ppm @ 130 (accept: 220) but failed for CO% 6.01 (accept: 1.20) extra info CO2% 11.5 (ok) and O2% 0.1 (ok)

also i failed for the gas cap not holding pressure but it is a year old?!?!?!

wth? i thought i stumbled on a post a while ago re: the inspectors not being able to properly test the old yj gas caps

so i think from the research on JF and the also calculating mpgeez and getting around 9 (although the was alot of idling on this tank) i have gathered that i am running rich. but am unsure of how to rectify. Should i be playing with weber idle mixture screw? I know weber says to set it half way between stumbles and mine pretty much is, although clockwise it backs out all the way and really doesnt stumble to poorly. Which direction is lean and which is rich? Probably changing oil, getting a stock temp t-stat, and trying to lean out weber. Could it be something else? Any other things to look at?

Thanks guys!

newyj · 08-10-2010, 11:41 PM

I would run low octane gas prior to the retest and maybe some marvel mystery oil, I put 93 in mine to run but low octane to test, also helps to have friendly testors!!!!!!!!!!!!

Shamrock84 · 08-11-2010, 07:17 AM

Quote:

Originally Posted by newyj

I would run low octane gas prior to the retest and maybe some marvel mystery oil, I put 93 in mine to run but low octane to test, also helps to have friendly testors!!!!!!!!!!!!

yea i do run 87 oct in the jeep at all times as i've never had a problem with knocking. i had also seafoamed it prior to plug change. testers dont seem as friendly since christie cut a good portion of their job.

SloppyJoseph · 08-11-2010, 07:20 AM

Wow it seemed you were extremely high in a few areas. Good luck man. I've never had to get a vehicle inspected so my adivce, move to Arkansas! haha

Old4X · 08-11-2010, 07:59 AM

Your carb is way out of range. You will need to re-jet the idle circuit, than carefully tune for desired results.

Can be done without one, but will go easier if you can use someone's exhaust gas analyzer.

Matt The Hammer · 08-11-2010, 08:10 AM

Quote:

Originally Posted by Shamrock84

yea i do run 87 oct in the jeep at all times as i've never had a problem with knocking. i had also seafoamed it prior to plug change. testers dont seem as friendly since christie cut a good portion of their job.

How old are you? The inspection station staff have never been friendly.

Pre-Whitman, post Whitman, rainy day, nice day, early morning... always cranky power tripping rude folks.

We get what we pay for. Although with the reduction in inspection requirements, do you think our annual registration costs will drop?

allennh · 08-11-2010, 08:16 AM

Nothing to say to help that hasn't already been said, just a friendly bump from an ex-NJ resident (Bergen co. ~10yrs), and it's nice to hear they've removed or dialed down some of the inspection requirements. I remember one year they put my car on the 'shaker'. Shocks were on their last legs and that machine just ruined them, I thought it was going to come flying off the damn machine it was bouncing around so much.

Ran over to the guy and yelled at him to turn it off before he broke my shock tower mounts or something.

Old4X · 08-11-2010, 08:39 AM

Here is a good lead for you:

http://www.jeepforum.com/forum/f8/we...-258-a-631105/

Cat glowing red = way too rich

Shamrock84 · 08-11-2010, 07:19 PM

haha 26 yrs old and true that in all my time and all our vehicles they act like tools all the time lol
was just talking to my brother wondering the same thing...we pay for inspection when we register so now that the state is saving money when will that get passed down to us?

anyway i have been reading that rich weber thread and trying to figure out what to do. I have never messed around with jets before. Does it matter that i got carb specifically for the application? I have heard many webers are jetted too rich from the factory. What is involved with re-jetting the idle circuit?
scratch that will begin research now lol
thanks fellas

Shamrock84 · 08-11-2010, 07:22 PM

o yea i wish i had one to work with! (exhaust gas analyzer)

Old4X · 08-11-2010, 07:33 PM

Quote:

Originally Posted by Shamrock84

o yea i wish i had one to work with! (exhaust gas analyzer)

I had a chance to buy a Sun exhaust gas analyzer for $50, kinda wish I had got it, but I don't use 90% of the tools I have now. This unit I saw was state of the art in 1978, still had all the cords and manuals!

**mark8201** · 08-11-2010, 07:42 PM

When I take my 87 through I have to tweek the weber carb a little, and the last time through I used a product called garenteed to pass made by CRC. I pass the test with just about zeros across the board.

Shamrock84 · 08-11-2010, 09:45 PM

Quote:

Originally Posted by mark8201

When I take my 87 through I have to tweek the weber carb a little, and the last time through I used a product called garenteed to pass made by CRC. I pass the test with just about zeros across the board.

what do u do to your weber?
whats the consensus, do u guys think the crc G2P works well? I've read conflicting reports...

bump for idle mixture directions, lean clockwise and rich counterclockwise??? cant find this. prolly searching for wrong thing tho lol found some sweet english weber tuning sites that have tons of info but not this.
> Weber Carb Tunibg

**mark8201** · 08-12-2010, 10:31 AM

I will check tonight and let you know I pull a vacuum line and adjust one screw.

Burnerman · 08-12-2010, 11:06 AM

Quote:

they still measured door height

Did they happen to mention what the stock measurement was they use as a baseline?
As far as reinspection I'd take it to a mechanic with knowledge of carbs and have them adjust it to pass. I managed to get my 89 thru with the carb for 2 inspections then switched to FI. The Howell kit gave me 2-3 more mpg and super clean emissions. I now have a swapped in 4.0 so I should be good to go next spring.
Good Luck!