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| [GMCnet] Starting problem [message #94368] |
Mon, 02 August 2010 20:14  |
Bradford Simms
Messages: 7
Registered: July 2010
Karma: 0
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Junior Member |
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Hi All,
I have been reading the forum for a month now and you folks help us all with
great information every day, Thanks.
Some background, I am working on a 75 Transmode, told the wife it would tale
a few weeks 2 and a bit years ago, I had big holes in both mufflers so
changed them out and started my baby for the first time in 12 months, "I
know" and she fired right up, but the right muffler was leaking at the
manifold.
Got a couple new flange gaskets and I went to test my work, now 2 weeks
later she will not start? bugger.
I used the Australian fuel injection method " pour some petrol in the carbie
mate" and she fired right up., Tossed the little filter and checked the
fuel pump which is pumping furiously. Ran a fuel line from the pump to fresh
gas , nuttin honey
I am not to good with the qudara bog , more a SU man, so not sure what to
look for , the primary opens a little when cranking and the secondaries seem
locked shut.
I was thinking I should have the unit rebuilt any ho but do you folks think
that's the issue?
Thanks to all, Brad
1975 Transmode soon back on the road.
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| Re: [GMCnet] Starting problem [message #94374 is a reply to message #94368] |
Mon, 02 August 2010 20:41  |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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My first guess is rotten rubber hoses.
Larry Davick
Ljdavick at comcast.net
On Aug 2, 2010, at 6:14 PM, Bradford Simms <bradfordsimms@gmail.com>
wrote:
> Hi All,
>
> I have been reading the forum for a month now and you folks help us
> all with
> great information every day, Thanks.
>
> Some background, I am working on a 75 Transmode, told the wife it
> would tale
> a few weeks 2 and a bit years ago, I had big holes in both mufflers so
> changed them out and started my baby for the first time in 12
> months, "I
> know" and she fired right up, but the right muffler was leaking at the
> manifold.
>
> Got a couple new flange gaskets and I went to test my work, now 2
> weeks
> later she will not start? bugger.
>
> I used the Australian fuel injection method " pour some petrol in
> the carbie
> mate" and she fired right up., Tossed the little filter and checked
> the
> fuel pump which is pumping furiously. Ran a fuel line from the pump
> to fresh
> gas , nuttin honey
>
> I am not to good with the qudara bog , more a SU man, so not sure
> what to
> look for , the primary opens a little when cranking and the
> secondaries seem
> locked shut.
>
> I was thinking I should have the unit rebuilt any ho but do you
> folks think
> that's the issue?
>
> Thanks to all, Brad
>
> 1975 Transmode soon back on the road.
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Starting problem [message #94386 is a reply to message #94368] |
Mon, 02 August 2010 21:54 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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Senior Member |
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| Bradford Simms wrote on Mon, 02 August 2010 20:14 |
Hi All,
I used the Australian fuel injection method " pour some petrol in the carbie
mate" and she fired right up., Tossed the little filter and checked the
fuel pump which is pumping furiously. Ran a fuel line from the pump to fresh
gas , nuttin honey
Thanks to all, Brad
1975 Transmode soon back on the road.
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i'm a little confused about what you are saying about the pump. is it elec. or mechanical? i had my elec. pump loose all its' rubber parts due to methanol gas. pump was running but not pumping.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] Starting problem [message #94413 is a reply to message #94368] |
Tue, 03 August 2010 00:06 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| Bradford Simms wrote on Mon, 02 August 2010 18:14 |
Hi All,
I have been reading the forum for a month now and you folks help us all with
great information every day, Thanks.
I was thinking I should have the unit rebuilt any ho but do you folks think
that's the issue?
Thanks to all, Brad
|
Brad,
If it is getting gas to the carb and it is even halfway working, you should see gas squirt some down when you pump the gas pedal. You can do this by hand so you can peer down and get a better look.
They say, Gas and Spark. Because you can start it by pouring in a bit of gas, we have to assume that spark is fine and you are not getting any gas to the engine. I don't think you are ready for a rebuild yet. Stay after the no gas in the carb theory. Some of these coaches have several fuel filters. The "little one" you tossed, I assume, is the one right where the fuel line goes to the carb? There is one there and they can really clog up.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] Starting problem [message #94421 is a reply to message #94368] |
Tue, 03 August 2010 07:01 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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Brad,
You might try to fill the fuel bowl through the vent tube in the front of the carb -- small plastic squirt bottle should work. Otherwise, about a tablespoon of fuel into carb as you did the first time.
When you say the primaries are only opening slightly -- that may be the choke plate. The secondary air flap is vacuum operated and will not open at start or usually at all until needed. There is also a smal tang on the front right side that retains the secondary air flap until the engine is up to temperature.
Sometimes when you have drained out the fuel the mechanical pump seems to loose it's prime.
Check for any major leaks -- the hose from the pcv valve to the base of the carb, line from the emission cannister and such.
Best torque for the carb to manifold is about 9 ft-lb.
Come back and let us know how it worked.
Dennis Sexton
73 PD 230
Germantown, TN
USA
-----Original Message-----
From: Bradford Simms <bradfordsimms@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Mon, Aug 2, 2010 8:14 pm
Subject: [GMCnet] Starting problem
Hi All,
I have been reading the forum for a month now and you folks help us all with
reat information every day, Thanks.
Some background, I am working on a 75 Transmode, told the wife it would tale
few weeks 2 and a bit years ago, I had big holes in both mufflers so
hanged them out and started my baby for the first time in 12 months, "I
now" and she fired right up, but the right muffler was leaking at the
anifold.
Got a couple new flange gaskets and I went to test my work, now 2 weeks
ater she will not start? bugger.
I used the Australian fuel injection method " pour some petrol in the carbie
ate" and she fired right up., Tossed the little filter and checked the
uel pump which is pumping furiously. Ran a fuel line from the pump to fresh
as , nuttin honey
I am not to good with the qudara bog , more a SU man, so not sure what to
ook for , the primary opens a little when cranking and the secondaries seem
ocked shut.
I was thinking I should have the unit rebuilt any ho but do you folks think
hat's the issue?
Thanks to all, Brad
1975 Transmode soon back on the road.
______________________________________________
MCnet mailing list
ist Information and Subscription Options:
ttp://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Starting problem [message #323144 is a reply to message #323142] |
Fri, 01 September 2017 22:33 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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THOMAS R WHITTON wrote on Fri, 01 September 2017 20:18 Would you guys tell me where to look first for a starting problem that just reared it's ugly head. When I turn the key to start nothing happens but the coach starts immediately using the boost switch. I checked both batteries. Both were fine, showing almost 14 volts. Where do I check first?
Thanks,
Tom Whitton26 foot updated GMCPaducah, KY
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I would check the starting battery cables for a bad or loose connection both positive and negative. With a voltmeter on the plus terminal and negative terminal do you show 12 volts while trying to start it normally? If so it's probibly a loose cable. If the volts goes down a few volts lower I would suspect a bad start battery or discharged one.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Starting problem [message #323147 is a reply to message #323144] |
Fri, 01 September 2017 23:46 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Start with the connections on the engine battery, then to the boost switch,
then to the starter, then to ground. You will most likely find it. Grab the
cables with your hand and try to move them. Don't be gentle.
Jim Hupy
On Sep 1, 2017 8:34 PM, "roy keen" wrote:
> THOMAS R WHITTON wrote on Fri, 01 September 2017 20:18
>> Would you guys tell me where to look first for a starting problem that
> just reared it's ugly head. When I turn the key to start nothing happens
>> but the coach starts immediately using the boost switch. I checked both
> batteries. Both were fine, showing almost 14 volts. Where do I check
>> first?
>> Thanks,
>> Tom Whitton26 foot updated GMCPaducah, KY
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> I would check the starting battery cables for a bad or loose connection
> both positive and negative. With a voltmeter on the plus terminal and
> negative
> terminal do you show 12 volts while trying to start it normally? If so
> it's probibly a loose cable. If the volts goes down a few volts lower I
> would
> suspect a bad start battery or discharged one.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
> GMCnet mailing list
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>
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| Re: [GMCnet] Starting problem [message #323150 is a reply to message #323147] |
Sat, 02 September 2017 05:52 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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And don't ignore the cable end to cable connections either. I was having a
slow starting problem which I couldn't find until my son was watching as I
hit the starter. Smoke coming out of the connector at the cable was a good
clue.
Ken H.
On Sat, Sep 2, 2017 at 12:46 AM, James Hupy wrote:
> Start with the connections on the engine battery, then to the boost switch,
> then to the starter, then to ground. You will most likely find it. Grab the
> cables with your hand and try to move them. Don't be gentle.
> Jim Hupy
>
> On Sep 1, 2017 8:34 PM, "roy keen" wrote:
>
>> THOMAS R WHITTON wrote on Fri, 01 September 2017 20:18
>>> Would you guys tell me where to look first for a starting problem that
>> just reared it's ugly head. When I turn the key to start nothing happens
>>> but the coach starts immediately using the boost switch. I checked
> both
>> batteries. Both were fine, showing almost 14 volts. Where do I check
>>> first?
>>> Thanks,
>>> Tom Whitton26 foot updated GMCPaducah, KY
>>>
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>> I would check the starting battery cables for a bad or loose connection
>> both positive and negative. With a voltmeter on the plus terminal and
>> negative
>> terminal do you show 12 volts while trying to start it normally? If so
>> it's probibly a loose cable. If the volts goes down a few volts lower I
>> would
>> suspect a bad start battery or discharged one.
>> --
>> Roy Keen
>> Minden,NV
>> 76 X Glenbrook
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
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>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Starting problem [message #323210 is a reply to message #94368] |
Sat, 02 September 2017 19:49 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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If the chassis battery still measures ~~14 V when you turn the keyto start (Measured at the battery posts, the cables or connections are FUBAR somewhere. If however it drops to nothing, the battery is toast.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Starting problem [message #323271 is a reply to message #94368] |
Sun, 03 September 2017 21:14 |
THOMAS R WHITTON
Messages: 47
Registered: September 2016
Karma: -1
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Member |
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Everyone that suggested a solution to my problem was exactly right. Basically, check the battery cables. The problem turned out to be a broken signal running from the auto battery. I traced everything I could think of and removed the batteries to take them in for a good test. The batteries tested good. As I was putting everything back together I found the end of a connection to the signal wire laying under the coach. It had fallen off when I disconnected the battery. Soldered on a new end, turned the key and the engine fired without the boost switch. Bingo! Simple solution but hard to find.
Thanks for the suggestions.
Tom Whitton 26 foot updated GMCPaducah, KY
Original question:Would you guys tell me where to look first for a starting problem that just reared it's ugly head. When I turn the key to start nothing happens but the coach starts immediately using the boost switch. I checked both batteries. Both were fine, showing almost 14 volts. Where do I check first?
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