Home » Public Forums » GMCnet » Re: [GMCnet] ????Vapor Lock (yes, again)
| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88180] |
Sat, 12 June 2010 07:07  |
chucklexie
Messages: 44
Registered: June 2010
Karma: 0
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I just purchased a 78 Royale and coming back home from refueling yesterday I had (what could be vapor locks) I was not sure I was going to get home. I had no problem when driving about 70 miles on the highway checking it out. In 5 miles it dies 5 times acting like it just ran out of gas. I was thinking I may have a fuel line sucking air. It does have an electric fuel pump and mechanical. It does seem to work better on reserve tank setting (maybe a coincidence). What is the TRUE test for this malady??? Anyone have suggestion? May just have purchased a pig in a poke. Beautiful coach but not muck faith in it right now.
Chuck
---------- Original Message ----------
From: Charles <gcw13@sbcglobal.net>
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Vapor Lock (yes, again)
Date: Sat, 12 Jun 2010 06:38:42 -0500
Eugene,
Electric fuel pump is not the solution. I had both manual and electric and still had vapor lock. Lock on manual and electric would only sometimes take care of the problem. I removed manual pump and went strictly with electric. Still have problem. Electric pump is just forward of the tank selector valve about
three inches. What do we do now? I am ready to try almost any thing and I don't have mountains.
Charles
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| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88182 is a reply to message #88180] |
Sat, 12 June 2010 07:19  |
Ken Coit
Messages: 151
Registered: November 2005
Karma: 0
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Senior Member |
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Water?? Could it be that the water in the tanks settles to the intake when
the vehicle is not moving? Do you have a fuel/water separator?
On Sat, Jun 12, 2010 at 8:07 AM, chucklexie@juno.com <chucklexie@juno.com>wrote:
> I just purchased a 78 Royale and coming back home from refueling yesterday
> I had (what could be vapor locks) I was not sure I was going to get home. I
> had no problem when driving about 70 miles on the highway checking it out.
> In 5 miles it dies 5 times acting like it just ran out of gas. I was
> thinking I may have a fuel line sucking air. It does have an electric fuel
> pump and mechanical. It does seem to work better on reserve tank setting
> (maybe a coincidence). What is the TRUE test for this malady??? Anyone have
> suggestion? May just have purchased a pig in a poke. Beautiful coach but not
> muck faith in it right now.
>
>
> Chuck
>
> ---------- Original Message ----------
> From: Charles <gcw13@sbcglobal.net>
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Vapor Lock (yes, again)
> Date: Sat, 12 Jun 2010 06:38:42 -0500
>
>
>
>
> Eugene,
> Electric fuel pump is not the solution. I had both manual and electric and
> still had vapor lock. Lock on manual and electric would only sometimes take
> care of the problem. I removed manual pump and went strictly with electric.
> Still have problem. Electric pump is just forward of the tank selector valve
> about
> three inches. What do we do now? I am ready to try almost any thing and I
> don't have mountains.
> Charles
> _______________________________________________
> 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
>
--
Ken Coit, ND7N
Raleigh, NC
Parfait Royale
1978 Royale Rear Bath, 403, 3.07
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| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88189 is a reply to message #88182] |
Sat, 12 June 2010 07:41 |
Charles
Messages: 455
Registered: January 2004
Karma: 0
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Senior Member |
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I had a marine fuel/water separator that I removed when
I eliminated the manual fuel pump. The reason I removed
it is that, where it was located there was about 8 to 10
more feet of fuel line with it installed. Fuel tanks have been
cleaned and sealed. Pick up and sending units replaced.
All the fuel lines and filters have been replaced. I have
also tried different electric fuel pumps. Even went so far
as to try an 8 PSI pump only to flood the carburetor when
I turned it on. I am not the only one having this problem.
Others in the area are having the same problem. One
added second electric pump, so when he switches tanks
the second pump activated. Another just completed
dropping tanks, replacing lines and filters. Little or no
change. Around 100 degree temperatures, we all have
the exact same problems Denny described. The only thing
I have seen mensioned on the list that I have not done or
tried is insulating the fuel tanks.
Still looking fo answers.
Charles
----- Original Message -----
From: "Ken Coit" <ktcoit@gmail.com>
To: <gmclist@temp.gmcnet.org>
Sent: Saturday, June 12, 2010 7:19 AM
Subject: Re: [GMCnet] ????Vapor Lock (yes, again)
> Water?? Could it be that the water in the tanks settles to the intake
> when
> the vehicle is not moving? Do you have a fuel/water separator?
>
> On Sat, Jun 12, 2010 at 8:07 AM, chucklexie@juno.com
> <chucklexie@juno.com>wrote:
>
>> I just purchased a 78 Royale and coming back home from refueling
>> yesterday
>> I had (what could be vapor locks) I was not sure I was going to get home.
>> I
>> had no problem when driving about 70 miles on the highway checking it
>> out.
>> In 5 miles it dies 5 times acting like it just ran out of gas. I was
>> thinking I may have a fuel line sucking air. It does have an electric
>> fuel
>> pump and mechanical. It does seem to work better on reserve tank setting
>> (maybe a coincidence). What is the TRUE test for this malady??? Anyone
>> have
>> suggestion? May just have purchased a pig in a poke. Beautiful coach but
>> not
>> muck faith in it right now.
>>
>>
>> Chuck
>>
>> ---------- Original Message ----------
>> From: Charles <gcw13@sbcglobal.net>
>> To: gmclist@temp.gmcnet.org
>> Subject: Re: [GMCnet] Vapor Lock (yes, again)
>> Date: Sat, 12 Jun 2010 06:38:42 -0500
>>
>>
>>
>>
>> Eugene,
>> Electric fuel pump is not the solution. I had both manual and electric
>> and
>> still had vapor lock. Lock on manual and electric would only sometimes
>> take
>> care of the problem. I removed manual pump and went strictly with
>> electric.
>> Still have problem. Electric pump is just forward of the tank selector
>> valve
>> about
>> three inches. What do we do now? I am ready to try almost any thing and I
>> don't have mountains.
>> Charles
>> _______________________________________________
>> 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
>>
>
>
>
> --
> Ken Coit, ND7N
> Raleigh, NC
> Parfait Royale
> 1978 Royale Rear Bath, 403, 3.07
> _______________________________________________
> 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
Charles Wersal
Duncanville, Texas
26 foot 1975 Glenbrook
Pandora's Box
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| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88196 is a reply to message #88189] |
Sat, 12 June 2010 07:57 |
Sandra Price
Messages: 709
Registered: May 2006
Karma: 1
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Senior Member |
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On Sat, Jun 12, 2010 at 7:41 AM, Charles <gcw13@sbcglobal.net> wrote:
> I had a marine fuel/water separator that I removed when
> I eliminated the manual fuel pump. The reason I removed
> it is that, where it was located there was about 8 to 10
> more feet of fuel line with it installed. Fuel tanks have been
> cleaned and sealed. Pick up and sending units replaced.
> All the fuel lines and filters have been replaced. I have
> also tried different electric fuel pumps. Even went so far
> as to try an 8 PSI pump only to flood the carburetor when
> I turned it on. I am not the only one having this problem.
> Others in the area are having the same problem. One
> added second electric pump, so when he switches tanks
> the second pump activated. Another just completed
> dropping tanks, replacing lines and filters. Little or no
> change. Around 100 degree temperatures, we all have
> the exact same problems Denny described. The only thing
> I have seen mensioned on the list that I have not done or
> tried is insulating the fuel tanks.
> Still looking fo answers.
> Charles
>
>
> ----- Original Message -----
> From: "Ken Coit" <ktcoit@gmail.com>
> To: <gmclist@temp.gmcnet.org>
> Sent: Saturday, June 12, 2010 7:19 AM
> Subject: Re: [GMCnet] ????Vapor Lock (yes, again)
>
>
> > Water?? Could it be that the water in the tanks settles to the intake
> > when
> > the vehicle is not moving? Do you have a fuel/water separator?
> >
> > On Sat, Jun 12, 2010 at 8:07 AM, chucklexie@juno.com
> > <chucklexie@juno.com>wrote:
> >
> >> I just purchased a 78 Royale and coming back home from refueling
> >> yesterday
> >> I had (what could be vapor locks) I was not sure I was going to get
> home.
> >> I
> >> had no problem when driving about 70 miles on the highway checking it
> >> out.
> >> In 5 miles it dies 5 times acting like it just ran out of gas. I was
> >> thinking I may have a fuel line sucking air. It does have an electric
> >> fuel
> >> pump and mechanical. It does seem to work better on reserve tank setting
> >> (maybe a coincidence). What is the TRUE test for this malady??? Anyone
> >> have
> >> suggestion? May just have purchased a pig in a poke. Beautiful coach but
> >> not
> >> muck faith in it right now.
> >>
> >>
> >> Chuck
> >>
> >> ---------- Original Message ----------
> >> From: Charles <gcw13@sbcglobal.net>
> >> To: gmclist@temp.gmcnet.org
> >> Subject: Re: [GMCnet] Vapor Lock (yes, again)
> >> Date: Sat, 12 Jun 2010 06:38:42 -0500
> >>
> >>
> >>
> >>
> >> Eugene,
> >> Electric fuel pump is not the solution. I had both manual and electric
> >> and
> >> still had vapor lock. Lock on manual and electric would only sometimes
> >> take
> >> care of the problem. I removed manual pump and went strictly with
> >> electric.
> >> Still have problem. Electric pump is just forward of the tank selector
> >> valve
> >> about
> >> three inches. What do we do now? I am ready to try almost any thing and
> I
> >> don't have mountains.
> >> Charles
> >> _______________________________________________
> >> 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
> >>
> >
> >
> >
> > --
> > Ken Coit, ND7N
> > Raleigh, NC
> > Parfait Royale
> > 1978 Royale Rear Bath, 403, 3.07
> > _______________________________________________
> > 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
>
--
IN GOD WE TRUST!
Sandra and Bob in the 51st Year of our State of Marriage
“Life’s a Trip” in “The Roadhouse”
’73 Painted Desert
Huntsville, TX
Finally, all of you, live in harmony with one another, be sympathetic, love
as brothers, be compassionate and humble. Do not repay evil with evil or
insult with insult, but with blessing, because to this you were called so
that you may inherit a blessing. --1 Peter 3:8-9
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
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| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88197 is a reply to message #88180] |
Sat, 12 June 2010 08:03 |
Sandra Price
Messages: 709
Registered: May 2006
Karma: 1
|
Senior Member |
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Chuck, where do you live?
Bob Price
On Sat, Jun 12, 2010 at 7:07 AM, chucklexie@juno.com <chucklexie@juno.com>wrote:
> I just purchased a 78 Royale and coming back home from refueling yesterday
> I had (what could be vapor locks) I was not sure I was going to get home. I
> had no problem when driving about 70 miles on the highway checking it out.
> In 5 miles it dies 5 times acting like it just ran out of gas. I was
> thinking I may have a fuel line sucking air. It does have an electric fuel
> pump and mechanical. It does seem to work better on reserve tank setting
> (maybe a coincidence). What is the TRUE test for this malady??? Anyone have
> suggestion? May just have purchased a pig in a poke. Beautiful coach but not
> muck faith in it right now.
>
>
> Chuck
>
> ---------- Original Message ----------
> From: Charles <gcw13@sbcglobal.net>
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Vapor Lock (yes, again)
> Date: Sat, 12 Jun 2010 06:38:42 -0500
>
>
>
>
> Eugene,
> Electric fuel pump is not the solution. I had both manual and electric and
> still had vapor lock. Lock on manual and electric would only sometimes take
> care of the problem. I removed manual pump and went strictly with electric.
> Still have problem. Electric pump is just forward of the tank selector valve
> about
> three inches. What do we do now? I am ready to try almost any thing and I
> don't have mountains.
> Charles
> _______________________________________________
> 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
>
--
IN GOD WE TRUST!
Sandra and Bob in the 51st Year of our State of Marriage
“Life’s a Trip” in “The Roadhouse”
’73 Painted Desert
Huntsville, TX
Finally, all of you, live in harmony with one another, be sympathetic, love
as brothers, be compassionate and humble. Do not repay evil with evil or
insult with insult, but with blessing, because to this you were called so
that you may inherit a blessing. --1 Peter 3:8-9
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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|
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| Re: [GMCnet] ????Vapor Lock (yes, again) [message #88209 is a reply to message #88189] |
Sat, 12 June 2010 08:29 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
|
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I have been on 1 run to one of our rallies this spring in late may
here in Michigan and it was unseasonably hot in the high 80's. Coming
out of 2 rest areas the coach stumbled a little under acceleration
then cleaned up. I have an all electric fuel system, p4070 pump,
just after a filter just after the selector valve and an inline fuel
filter at the old mechanical pump was located at. No filter in the
carb. Had no issue all winter on trip to Florida and back. When I
took the cap off the fuel tank to fill I got a rush of fuel vapor as
it depressurized. The gas appears to be the issue. When I fill the
tanks up the gas is cool and no problems. Next step is to add the
heat shield on the exhaust as it passes the gas tanks. See if that
reduces the heat gain.
J.R. Wright
On Jun 12, 2010, at 8:41 AM, Charles wrote:
> I had a marine fuel/water separator that I removed when
> I eliminated the manual fuel pump. The reason I removed
> it is that, where it was located there was about 8 to 10
> more feet of fuel line with it installed. Fuel tanks have been
> cleaned and sealed. Pick up and sending units replaced.
> All the fuel lines and filters have been replaced. I have
> also tried different electric fuel pumps. Even went so far
> as to try an 8 PSI pump only to flood the carburetor when
> I turned it on. I am not the only one having this problem.
> Others in the area are having the same problem. One
> added second electric pump, so when he switches tanks
> the second pump activated. Another just completed
> dropping tanks, replacing lines and filters. Little or no
> change. Around 100 degree temperatures, we all have
> the exact same problems Denny described. The only thing
> I have seen mensioned on the list that I have not done or
> tried is insulating the fuel tanks.
> Still looking fo answers.
> Charles
>
>
> ----- Original Message -----
> From: "Ken Coit" <ktcoit@gmail.com>
> To: <gmclist@temp.gmcnet.org>
> Sent: Saturday, June 12, 2010 7:19 AM
> Subject: Re: [GMCnet] ????Vapor Lock (yes, again)
>
>
>> Water?? Could it be that the water in the tanks settles to the
>> intake
>> when
>> the vehicle is not moving? Do you have a fuel/water separator?
>>
>> On Sat, Jun 12, 2010 at 8:07 AM, chucklexie@juno.com
>> <chucklexie@juno.com>wrote:
>>
>>> I just purchased a 78 Royale and coming back home from refueling
>>> yesterday
>>> I had (what could be vapor locks) I was not sure I was going to
>>> get home.
>>> I
>>> had no problem when driving about 70 miles on the highway checking
>>> it
>>> out.
>>> In 5 miles it dies 5 times acting like it just ran out of gas. I was
>>> thinking I may have a fuel line sucking air. It does have an
>>> electric
>>> fuel
>>> pump and mechanical. It does seem to work better on reserve tank
>>> setting
>>> (maybe a coincidence). What is the TRUE test for this malady???
>>> Anyone
>>> have
>>> suggestion? May just have purchased a pig in a poke. Beautiful
>>> coach but
>>> not
>>> muck faith in it right now.
>>>
>>>
>>> Chuck
>>>
>>> ---------- Original Message ----------
>>> From: Charles <gcw13@sbcglobal.net>
>>> To: gmclist@temp.gmcnet.org
>>> Subject: Re: [GMCnet] Vapor Lock (yes, again)
>>> Date: Sat, 12 Jun 2010 06:38:42 -0500
>>>
>>>
>>>
>>>
>>> Eugene,
>>> Electric fuel pump is not the solution. I had both manual and
>>> electric
>>> and
>>> still had vapor lock. Lock on manual and electric would only
>>> sometimes
>>> take
>>> care of the problem. I removed manual pump and went strictly with
>>> electric.
>>> Still have problem. Electric pump is just forward of the tank
>>> selector
>>> valve
>>> about
>>> three inches. What do we do now? I am ready to try almost any
>>> thing and I
>>> don't have mountains.
>>> Charles
>>> _______________________________________________
>>> 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
>>>
>>
>>
>>
>> --
>> Ken Coit, ND7N
>> Raleigh, NC
>> Parfait Royale
>> 1978 Royale Rear Bath, 403, 3.07
>> _______________________________________________
>> 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
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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