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| GMC on Dyno at Emssions [message #73928] |
Mon, 15 February 2010 16:23  |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
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Hi Everyone. Had the GMC at Emissions testing today. My Son took a video of it. We posted it on youtube. It's at 40 MPH.
http://www.youtube.com/watch?v=ki2fSg7XStU
Happy Viewing.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73935 is a reply to message #73928] |
Mon, 15 February 2010 19:00  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Chris,
I did a bit of poking around the ADEQ website but couldn't find what kind of
report they provide.
I was wondering if the info provided can help you tune the GMC?
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Chris Choffat
Sent: Tuesday, 16 February 2010 9:23 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] GMC on Dyno at Emssions
Hi Everyone. Had the GMC at Emissions testing today. My Son took a video of
it. We posted it on youtube. It's at 40 MPH.
http://www.youtube.com/watch?v=ki2fSg7XStU
Happy Viewing.
--
-Chr$: Perpetual SmartAss
77 Ex-Kingsley 455, Power Drive, 3:21 FD U S S Kobiashi Maru: The
Engineer's Motorhome
S T I L L - U N D E R - C O N S T R U C T I O N
Scottsdale, AZ
Photosite: Chrisc "It has Begun"
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73941 is a reply to message #73935] |
Mon, 15 February 2010 19:35 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
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Hi Rob,
Here is the data from today:
Loaded Result PASS
HC Idle
HC Idle Result PASS
HC Score In PPM 58 HC Idle Std 350
CO Idle
CO Idle Result PASS
CO Score In % 0.10 CO Idle Std 4.00
HC Loaded
HC Loaded Result PASS
HC Score In PPM 24 HC Loaded Std 350
CO Loaded
CO Loaded Result PASS
CO Score In % 0.08 CO Loaded Std 3.00
Std is the limit, the number before it is actual. I failed initial today, but there was no line, the coach was cold, and i had my air filter installed. A little trick to keeping the HC down is take the air filter out before you get there. the engine will breathe better. the initial was 387. so taking the filter out and upping the idle to a smoother idle in Drive gave me a 329 point drop in HC.The PCV valve was loose  on the second run too.
I do know my coach runs a bit rich. I will be sending the Carb to Dick soon, so soon I'll have a proper running carb. My coach also has California Emissions controls.
As you can see the numbers are in the "pass with flying colors" categories. Amazing numbers, really, for an old clunker with 113K miles on it and no cat's.
All, If you know the VIN of a vehicle that you are looking at in Arizona, you can get the history at the ADEQ website.
hope this is helpful.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73959 is a reply to message #73941] |
Mon, 15 February 2010 20:39 |
Wayne
Messages: 106
Registered: August 2004
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Hi Chris,
My HC was high and I corrected it by adjusting the carb, using the lean drop method as described in the 76 manual. It is easier than r&r carb.
Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence@verizon.net
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73964 is a reply to message #73959] |
Mon, 15 February 2010 20:52 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Wayne,
What page?
Shows I have not read the book.
On Mon, Feb 15, 2010 at 6:39 PM, Wayne Lawrence <wayne4@ca.rr.com> wrote:
>
>
> Hi Chris,
>
> My HC was high and I corrected it by adjusting the carb, using the lean drop method as described in the 76 manual. It is easier than r&r carb.
>
> --
> Wayne Lawrence
> 76 Birchaven
> Bellflower CA
> wayne4@ca.rr.com
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73965 is a reply to message #73959] |
Mon, 15 February 2010 21:03 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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My carb is crap anyway. Accel pump not working right, etc. needs rebuild.
| Wayne wrote on Mon, 15 February 2010 19:39 |
Hi Chris,
My HC was high and I corrected it by adjusting the carb, using the lean drop method as described in the 76 manual. It is easier than r&r carb.
|
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] GMC on Dyno at Emssions [message #73968 is a reply to message #73965] |
Mon, 15 February 2010 21:13 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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| Chr$ wrote on Mon, 15 February 2010 22:03 |
My carb is crap anyway. Accel pump not working right, etc. needs rebuild.
| Wayne wrote on Mon, 15 February 2010 19:39 |
Hi Chris,
My HC was high and I corrected it by adjusting the carb, using the lean drop method as described in the 76 manual. It is easier than r&r carb.
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Chri$: you can replace the pump with the carb on the coach. Spray carb cleaner thru the nozles from the inside, & drop in a new pump. tap the lever pivot pin in just far enough to get the arm off. Don`t tap it all the way to the housing so you can use a screwdriver to push it back. The choke rod can be re-hooked from the top with a flshlight and bifocals. I use an old speaker magnet on the valvecover to keep parts on.
C. Boyd
76 Crestmont
East Tennessee
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| Re: GMC on Dyno at Emssions [message #73992 is a reply to message #73928] |
Mon, 15 February 2010 23:03 |
Wayne
Messages: 106
Registered: August 2004
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Hi Jim,
Page 6M-24
Item 14
Idle Mixture adjustment
The only tools you HAVE TO HAVE is tach and screwdriver. If gmcers can't find it I can post a photo tomorrow.
Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence@verizon.net
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74011 is a reply to message #73935] |
Tue, 16 February 2010 06:16 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Not a chance of that Rob. Pass or fail, with an explanation if you're lucky.
On Mon, Feb 15, 2010 at 6:00 PM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Chris,
>
> I did a bit of poking around the ADEQ website but couldn't find what kind of
> report they provide.
>
> I was wondering if the info provided can help you tune the GMC?
>
> Regards,
> Rob Mueller
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Chris Choffat
> Sent: Tuesday, 16 February 2010 9:23 AM
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] GMC on Dyno at Emssions
>
> Hi Everyone. Had the GMC at Emissions testing today. My Son took a video of
> it. We posted it on youtube. It's at 40 MPH.
>
> http://www.youtube.com/watch?v=ki2fSg7XStU
>
> Happy Viewing.
> --
> -Chr$: Perpetual SmartAss
> 77 Ex-Kingsley 455, Power Drive, 3:21 FD U S S Kobiashi Maru: The
> Engineer's Motorhome
> S T I L L - U N D E R - C O N S T R U C T I O N
> Scottsdale, AZ
> Photosite: Chrisc "It has Begun"
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74022 is a reply to message #73935] |
Tue, 16 February 2010 07:58 |
Luvn737s
Messages: 1106
Registered: June 2007
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| Robert Mueller wrote on Mon, 15 February 2010 18:00 |
Chris,
I did a bit of poking around the ADEQ website but couldn't find what kind of
report they provide.
I was wondering if the info provided can help you tune the GMC?
|
No, all you know is you have $19 less every year to spend on tuning your GMC.
I wrote both my state congressmen asking them to reconsider the annual emissions testing requirement, as they do with classic cars (which are eligible due to the classic car insurance they must carry and it's mileage limits). Since no classic motorhome insurance is available, we're stuck taking it in every year and playing emission roulette.
How many coaches are left to rot because the cost to bring them into compliance (even if that cost is unknown, but assumed to be prohibitive)?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74122 is a reply to message #74022] |
Wed, 17 February 2010 03:31 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Emissions testing is headed our way Randy. It won't be long before
the environmental Nazis make it this far south. You need a friend,
son, or daughter in a compliant area to co-own the GMC so you can
register it there and don't have to put up with that nonsense and
expense.
On Tue, Feb 16, 2010 at 6:58 AM, Randy <Acrosport2@hotmail.com> wrote:
I wrote both my state congressmen asking them to reconsider the annual
emissions testing requirement, as they do with classic cars (which are
eligible due to the classic car insurance they must carry and it's
mileage limits). Since no classic motorhome insurance is available,
we're stuck taking it in every year and playing emission roulette.
> How many coaches are left to rot because the cost to bring them into compliance (even if that cost is unknown, but assumed to be prohibitive)?
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74130 is a reply to message #74122] |
Wed, 17 February 2010 07:03 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Steve,
I you had a properly tuned GMC would you fail the test?
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Steven Ferguson
Sent: Wednesday, 17 February 2010 8:32 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] GMC on Dyno at Emssions
Emissions testing is headed our way Randy. It won't be long before
the environmental Nazis make it this far south. You need a friend,
son, or daughter in a compliant area to co-own the GMC so you can
register it there and don't have to put up with that nonsense and
expense.
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74135 is a reply to message #74130] |
Wed, 17 February 2010 08:08 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Rob,
Used to was that the testing was done at idle, then at a given high
rpm. The testing is now done on a chassis dyno while under load. A
condition where most engines are at their dirtiest, sort of like when
you are accelerating on an on-ramp or to pass a vehicle. Mains are
all in as is the power circuit. We're talking 40 yr old stuff here
that has to work as it did when new. But wait, there's more. You
must first pass the visual and anything not working or missing is an
instant fail. That means two charcoal cannisters on some coaches, a
working PCV valve, TVS, heat riser, Thermac valve on the air cleaner
etc. 40 years ago the fuel was different too so there's lots of
variables that can pass or fail a coach. Sure, there's lots of
testing stations that have employees that in some cases aren't sure of
what they're looking at but that shouldn't be a variable.
Plenty of properly tuned GMCs pass. In CA, if yours doesn't pass,
you have four tests, 6 mos apart in which it must pass or be scrapped,
or sold out of state. Just try selling a gross polluter vehicle in
some states. They are electronicallly tagged at the CA DMV.
On Wed, Feb 17, 2010 at 6:03 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Steve,
>
> I you had a properly tuned GMC would you fail the test?
>
> Regards,
> Rob Mueller
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Steven Ferguson
> Sent: Wednesday, 17 February 2010 8:32 PM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] GMC on Dyno at Emssions
>
> Emissions testing is headed our way Randy. It won't be long before
> the environmental Nazis make it this far south. You need a friend,
> son, or daughter in a compliant area to co-own the GMC so you can
> register it there and don't have to put up with that nonsense and
> expense.
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
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| Re: GMC on Dyno at Emssions [message #74140 is a reply to message #73928] |
Wed, 17 February 2010 09:41 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Guys, the inspection for a vehicle this year with a GVW over 8500 is very simple. They check the vin, put the hose on and start the test. they never look under the hatch, and I think they only checked the gas cap once a few years ago. They never check the loose PCV valves or anything like that.
It actually runs cleaner under load, and a high idle speed new or no air filter in the can helps at idle. they run at 40mph for about 2 min, then the idle test is performed, so the test is engineered to test at proper engine temps and pass more cars.
If I ever get to the point that it will not pass, my backup is my mom's address in Sedona! 
If you fail, you can go into the office and they give you some advice (This is where I learned about the air filter thing when my 1987 carbureted mitsubishi truck failed)
There is also the advanced emissions center that they send you to after you spend ~$700 and still fail.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74143 is a reply to message #74140] |
Wed, 17 February 2010 09:53 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Chris,
You can't always count on a "relaxed" visual inspection. If someone
held the huge fines these stations pay for violations over my head,
you can bet I'd do it right. That's a good point you brought up, an
engine heat soaked thoroughly up to operating temps will pass better
than one that was just driven a short distance to the testing
facility. The reformulated fuels do burn cleaner.
On Wed, Feb 17, 2010 at 8:41 AM, Chris Choffat <cchoffataz@yahoo.com> wrote:
>
>
> Guys, the inspection for a vehicle this year with a GVW over 8500 is very simple. They check the vin, put the hose on and start the test. they never look under the hatch, and I think they only checked the gas cap once a few years ago. They never check the loose PCV valves or anything like that. :roll:
>
> It actually runs cleaner under load, and a high idle speed new or no air filter in the can helps at idle. they run at 40mph for about 2 min, then the idle test is performed, so the test is engineered to test at proper engine temps and pass more cars.
>
> If I ever get to the point that it will not pass, my backup is my mom's address in Sedona! :twisted:
>
> If you fail, you can go into the office and they give you some advice (This is where I learned about the air filter thing when my 1987 carbureted mitsubishi truck failed)
>
> There is also the advanced emissions center that they send you to after you spend ~$700 and still fail.
> --
> -Chr$: Perpetual SmartAss
> 77 Ex-Kingsley 455, Power Drive, 3:21 FD U S S Kobiashi Maru: The Engineer's Motorhome
> S T I L L - U N D E R - C O N S T R U C T I O N
> Scottsdale, AZ
> Photosite: Chrisc "It has Begun"
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] GMC on Dyno at Emssions [message #74146 is a reply to message #74143] |
Wed, 17 February 2010 10:23 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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I don't think they are even required to check under the hood for anything on a 1978 or older truck. I recall that we had a 1978 F250 with a 351W that ran on regular leaded gas, 1978 was the last year for it, and these coaches probably did too. they have to pass a test for a leaded fuel vehicle, hence no underhood inspection.
Randy, did they look under your hatch?
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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