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  #1  
Old 08-17-2011, 08:49 PM
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Thomas792 Thomas792 is offline
327 Rambler
 
Join Date: Sep 16, 2007
Location: Woodbridge, VA
Posts: 625
VA Emissions Failure (updated - Passed)

I searched and I think I have a reasonable answer which appears at the end of this post.

So I took my GW to get it emissions tested. Having recently retired from the Marine Corps, I have to get my vehicle registered in Virginia as I am now a resident there. Michigan did not have any emissions testing so all was good until now. I expected to fail miserably but I only failed in one area. The details are below.

ASM2 tailpipe emissions inspection
15 MPH 25 MPH
Limit Reading Result Limit Reading Result
HC ppm 135 96 Pass 131 44 Pass
CO% 1.13 2.83 Fail 1.45 0.37 Pass
NO ppm 1350 498 Pass 1249 250 Pass
RPM 1362 Valid RPM 1362 Valid
Dilution 15.8 Valid Dilution 15 Valid

This is what I have:
AMC 360 ~ 35,000 miles
- Edelbrock 1406 carburetor at stock settings
- Edelbrock intake manifold
- Unknown camshaft
- Edelbrock shorty headers with air injection manifolds welded on
- Magnaflow 94016 catalytic converter
- Dynomax Super Turbo muffler
- MSD 6A ignition module, distributor, and Blaster 2 coil
- 2.5” exhaust from Y-pipe to end of tailpipe
- Air injection pump from 1974 J10 (not run in 14 years but apparently working fine)
- Hoses properly hooked up from air injection pump to air injection manifolds but blocked to pipe going to catalytic converter (pipe is not installed and catalytic converter tube is capped)
- Completely misrouted vacuum lines (idles fine and accelerates well so I’m afraid to mess with it at this time)

Maintenance recently performed:
- New plugs ~ 2,000 miles ago
- Timing set at 12 deg
- New catalytic converter installed ~ 200 miles ago
- Fresh oil change (Seafoam added to oil and driven for 40 miles to “reliquify” deposits then oil changed)
- Seafoam added to gas tank at 1 oz to 1 gal ratio and tank ran to near empty

What I intend to do:
- Lean out carburetor in accordance with the Edlebrock 1406 tuning manual (downloaded from internet) so that it will idle and drive but decrease CO across the board. This appears to be one size smaller in the Main Jet and a different Metering Rod. The manual makes it sound too easy for me to screw up.
- Change the air filter

I have 14 days to get it retested for free so I'll be getting into the carb this weekend and get it retested by next friday hopefully and put this all behind me.

Am I on track or are there other things I should pursue?
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1974 J10 (401, Th400, Q-Trac, D44s, 28" tires)
Mrs Tickity - 1988 GW (360, 727, 229, D44s, 32" tires)

Last edited by Thomas792 : 08-24-2011 at 08:39 PM.
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  #2  
Old 08-18-2011, 06:09 AM
thatguy
 
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ugh! I soooo feel your pain. When I lived up in Fairfax, grtting my Liberty through emmisions was a nightmare and it was new. I am glad that moving a couple hours south in VA removed those regulations. I thank GOD that I dont have to fight that with my GW! Good luck! Sorry I cant help with your question!
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  #3  
Old 08-18-2011, 06:25 AM
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shaggywaggy88 shaggywaggy88 is offline
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Join Date: Feb 22, 2011
Location: Lynchburg, VA
Posts: 454
if you have any family in another county (one that dosent do emissions)just regester it in their county and take it there to get it inspected. I know its not 100% legal but somtimes you have to do what you can to get by. good luck
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88 Grand Wag:
Razor Grille
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  #4  
Old 08-18-2011, 06:44 AM
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puckettj puckettj is offline
232 I6
 
Join Date: May 17, 2011
Location: Alpharetta, GA
Posts: 152
You did almost everything I would have suggested. Mine past emissions this year with the air pump stuff removed (So I don't think that set up makes much difference)

The only other things I don't see mentioned are:
Drive the hell out of it for 30 minutes+ before pulling into the test facility, make sure its hot.
Replace the PCV valve and air filter.

That's all fairly minor stuff. I bet the issue lies in the carb settings somewhere. There are many on here that have set the carb to where it barely runs...take it in...pass the test...then readjust back to normal.

Good luck!!!
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'89 Sterling Silver Metallic GW Factory tow package with HD radiator, transmission cooler, hitch, remote door lock, overhead console.
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  #5  
Old 08-18-2011, 08:56 AM
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blkwarrior blkwarrior is offline
Gear Head
 
Join Date: Feb 15, 2010
Location: Tucson AZ
Posts: 547
Congratulations Marine you made it. I feel your pain on the emissions issue. I'm in the process of replacing my current motor in order to drive it. It will be registered in another county until I can rebuild the original 360 to be smog compliant. Who knows I may fail then too.
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  #6  
Old 08-18-2011, 01:26 PM
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Thomas792 Thomas792 is offline
327 Rambler
 
Join Date: Sep 16, 2007
Location: Woodbridge, VA
Posts: 625
I'd like to get it registered in VA so that there are no potential issues should I be pulled over at some time in the future. My parents are willing to register it under their names in MI (my dad is a career police officer and was not too thrilled but willing to help for the next 1.5 years.)

I'll be playing with the carb this weekend to see if I can get it to run at a leaner setting but how do I know when I am starting to do damage to the engine?
- increased temperature?
- lower/higher oil pressure?
- change in electrical output?

How do you know when the engine is pinging or knocking?
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1974 J10 (401, Th400, Q-Trac, D44s, 28" tires)
Mrs Tickity - 1988 GW (360, 727, 229, D44s, 32" tires)
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  #7  
Old 08-18-2011, 02:03 PM
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djongeward djongeward is offline
Bleedin' Gasoline
 
Join Date: May 21, 2008
Location: Imperial Valley, CA
Posts: 1,818
Quote:
Originally Posted by Thomas792
I'd like to get it registered in VA so that there are no potential issues should I be pulled over at some time in the future. My parents are willing to register it under their names in MI (my dad is a career police officer and was not too thrilled but willing to help for the next 1.5 years.)

I don't see any reason you can't register in your own name at their address. Particularly if your moble and unsettled. The smog issues are just icing on the cake. Hey, your family, right?
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89 Grandwagoneer, built 360, COMP cam set, port matched Edelbrock SP2P, 475 cfm Holley ORA, Thorleys, MSD6a, extra cooling and oiling.
76 Cherokee S Chief - rebuilt stock, Holley, Performer, MSD Dizzy.
89 GW parts waggy
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  #8  
Old 08-18-2011, 03:10 PM
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Thomas792 Thomas792 is offline
327 Rambler
 
Join Date: Sep 16, 2007
Location: Woodbridge, VA
Posts: 625
I am an official resident of VA. I live and work here so my vehicles must be registered in my county of residence. Now, if my GW was "owned" by my parents and I "borrowed" it for an undetermined length of time ... But I should try to pass emissions to be fully legal.
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1974 J10 (401, Th400, Q-Trac, D44s, 28" tires)
Mrs Tickity - 1988 GW (360, 727, 229, D44s, 32" tires)
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  #9  
Old 08-18-2011, 07:34 PM
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blkwarrior blkwarrior is offline
Gear Head
 
Join Date: Feb 15, 2010
Location: Tucson AZ
Posts: 547
You can have two residences I think... well that would be my excuse. But really could you get an emission exemption?
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1984 GW
360/727/208/ Edl 1406/ Custom exhaust


Future
Something Sweet with mean capabilities .
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  #10  
Old 08-24-2011, 08:37 PM
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Thomas792 Thomas792 is offline
327 Rambler
 
Join Date: Sep 16, 2007
Location: Woodbridge, VA
Posts: 625
Passed with flying colors

So I changed the air filter, PCV valve, and rejetted the carb.

I have the 1406 and dropped to #7 position on the chart (.095 main jet and .073x.047 metering rod) which was 6% lean on cruise and power mode and drove to work that way. Throttle response was some hesitation at light throttle but when I got on the pedal it performed as usual. About a block from the station I changed to the #12 position (.095 main jet and .075x.047 metering rod) which was 12% lean on cruise and 6% lean on power mode. Then I adjusted the idle mixture screws from 2 turns out to 1 3/4 turns out and it would barely idle (I knew it had to be good enough at that point).

I passed with room to spare.

HC was nearly 80% less than previous run
CO% went from 2.83 to 0
NO went from about 500 to about 700

Based on the numbers it was pretty lean (decreased CO and increased NO)

After it passed I limped it back to my office then changed the metering rods to get back to position #7 and reset the idle mixture screws. At home I put it back to the setting it was at before I started messing with it. I took it for a spin and it is the same tire spinning thrill ride it was a week ago.

Best of luck to those who have to do this, I know your pain.
__________________
1974 J10 (401, Th400, Q-Trac, D44s, 28" tires)
Mrs Tickity - 1988 GW (360, 727, 229, D44s, 32" tires)

Last edited by Thomas792 : 08-25-2011 at 03:11 PM.
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  #11  
Old 12-04-2017, 01:20 PM
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DenverWoody DenverWoody is offline
232 I6
 
Join Date: Oct 11, 2015
Location: Denver, CO
Posts: 26
I'm going through this in Colorado with my 1988. It passed last time, running so lean it would stall from a stop or going uphill. I had it adjusted after I passed and it was running well since then, but it failed its most recent test.

I rarely drive it unless the weather is good and traffic is minimal, because I live in Denver where other drivers are idiots and I don't want to take a chance. Mechanic (yes gentlemen, my house doesn't have a garage and I wasn't brought up in a car family) says plugs had deposits, suggesting it was running lean and not used much. He's adjusting the carb to lean it out, changing the filter, and trying a few more tricks.

My question is, has anyone tried denatured alcohol? Previous owner swears by this trick. When the tank is between 1/4 and 1/8 full pour two gallons of denatured alcohol into the tank right around the corner from the emissions station, because you don't want that sitting in your lines/ hoses. That fuel burns clean, so it should pass, then straight to the gas station to dilute what's left in your tank and avoid damage.

I have not tried yet...
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  #12  
Old 12-04-2017, 05:53 PM
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Woodchomper Woodchomper is offline
350 Buick
 
Join Date: Dec 17, 2002
Location: Saint Charles, Missouri
Posts: 923
Good job and thanks for sharing. Out of curiosity, what temperature thermostat are you running?
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1991 GW 401 /727TF/NP229 /4" Skyjacker /EBL TBI /CS-144
1981 J10 401 /727TF/NP208 /6" Superlift /CS-144
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