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[GMCnet] ????Vapor Lock (yes, again) [message #88188]

Sat, 12 June 2010 07:39

chucklexie

Messages: 44
Registered: June 2010

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That makes sense. Do you have to drop the tanks to do that?

Chuck

---------- Original Message ----------
From: "Mr.erf ERFisher" <mr.erfisher@gmail.com>
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] ????Vapor Lock (yes, again)
Date: Sat, 12 Jun 2010 05:31:43 -0700

It does seem to work better on reserve tank setting (maybe a coincidence).

I have not been following your problem----
but

I just replaced my selector valve. It would work on only one tank (lucky)
sometimes neither tank will work.

sounded like it was working but did not.

I guess you could bypass the selector valve and try one tank for a while to
see if this was the problem. ( or replace the valve;>)
gene

--
Gene Fisher -- 74-23,77PB/ore/ca
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Re: [GMCnet] ????Vapor Lock (yes, again) [message #88191 is a reply to message #88188]

Sat, 12 June 2010 07:46

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

> That makes sense. Do you have to drop the tanks to do that?
>
> no , on side rail in front of tanks.

I measured the fuel pressure, and could see it drop off when engine started
to stumble. Mine was clearly related to switch tanks.

gene

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
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Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] ????Vapor Lock (yes, again) [message #88484 is a reply to message #88188]

Sun, 13 June 2010 22:11

mike miller

Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon

Karma: 0

Senior Member

No. You do not need to drop the tanks to work on the selector valve. It is in the "bay" just ahead of the front (aux) tank.

Pump up the air bags and block up the suspension. (NEVER trust the airbags when under the coach!) Lay down next to the driver's side and you should be able to reach under to get to the valve.

Check the fuel lines when under there... if they are hard and/or cracking... replace them.

chucklexie wrote on Sat, 12 June 2010 05:39

That makes sense. Do you have to drop the tanks to do that?

> It does seem to work better on reserve tank setting (maybe
> a coincidence).
> ...
> I guess you could bypass the selector valve and try one
> tank for a while to see if this was the problem. ( or
> replace the valve;>)

Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo' http://m000035.blogspot.com

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