| [GMCnet] Stranded - engine surging / stalling issues [message #281106] |
Tue, 30 June 2015 16:47  |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
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Senior Member |
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All good points, Jon. One additional suggestion is to check the fuse that services that fuel selector switch. It needs to be at least 20 amps to carry the load of the fuel pump in addition to the fuel selector switch. Make sure to remove the existing fuse, clean the clips and the fuse ends and reinstall it with some kind of anti ox. The PO may have replaced that fuse with a lower amp unit and you do not want to have the fuse blow just when you need the electric fuel pump!
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Message: 1
Date: Tue, 30 Jun 2015 08:50:19 -0600
From: Jon Roche
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Stranded - engine surging / stalling issues
Message-ID:
Content-Type: text/plain; charset="utf-8"
I am sure you can overly complicate the dipping mechanism.
I personally just do not feel that there is a real big concern about filling the crankcase with fuel from the fuel pump. I know it has happened, and
I am sure it can happen, and the costs of a new engine are huge. But I believe the chance of that is really rare. There are far more mechanical
fuel pumps out there running, then people bypassing them and using electric fuel pumps.
Electric fuel pumps are a great thing, but again, if you want to keep things simple and inexpensive, the mechanical fuel pump is the way to go.
The JimB method of adding an aux fuel pump, has proven to be pretty successful. and what makes it really nice, is it is extremely inexpensive, and
very easy to install and operate. Will it solve all problems? I do not know, nor claim to know. I just know it has worked well for me.
buy an electric fuel pump with out a check valve such as:
http://www.amazon.com/Autobest-12S-Universal-Electronic-Fuel/dp/B00C59RSXG/ref=sr_1_6?ie=UTF8&qid=1435675065&sr=8-6&keywords=electric++fue l+pump
replace the fuel selector switch while you are under the coach:
http://www.amazon.com/Standard-Motor-Products-FV1T-Selector/dp/B005ETOVZM/ref=sr_1_1?ie=UTF8&qid=1435675462&sr=8-1&keywords=standard+fuel+ selector
plumb the fuel line coming from the aux tank to the fuel pump. then from the fuel pump to the aux in on the selector switch. the main tank fuel
line direct to the selector switch.
Jumper the wire that feeds the fuel selector switch, to power the fuel pump. ground the fuel pump to the frame. It can all be easily mounted to the
floor, just forward of the fuel tanks. easy to move the original fuel selector over for easy access.
so for about $60.00 and an hour of your time, mostly spent jacking up the coach to get under it. you are done.
switch the aux on the dash before starting the engine and listen for the pump to hear it running. It will prime your carb, and will start with less
cranking. then after starting, switch back to main tank. If you feel some hesitation that might be vapor lock, then switch dash over to aux to
push some fuel up, to overcome the vapor lock. My experience on flat land, and 90 temps, that is all it took. I have not had to travel at altitude,
or at temps closer to 100.
--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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Jerry & Sharon Work
78 Royale
Kerby, OR
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