| my Eureka moment [message #284515] |
Mon, 10 August 2015 16:20  |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Senior Member |
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Ok I am not out of the woods yet but I did discover one issue affecting gas delivery. My fuel line just before the pump was sliced/marred a bit and you could feel the air pulsating out of the spot. I did manage to remove and replace thinking yes this is it. BUT, it stalled again. So I checked all the fuel lines that I could see without lifting the coach and they read SAE 30R7. By Goodyear, installed by Cinnabar. I saw no leaks. However, my inline filter by the tanks was looking weak, the hoses were barely pulsating. I jumped in the coach and switched the tanks to non main tank and I saw gas moving through the filter much better. The lines were also pulsating pretty good everywhere accept behind the in line filter. I have an secondary fuel pump by the tanks. Anyways, the coach didn't stall out as quick but since the tank was low on gas I switched back to the main tank and boom stall within 10 seconds. Any ideas on issue(s)? The fuel selector switch was new in 2006. Thanks community!
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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| Re: [GMCnet] my Eureka moment [message #284519 is a reply to message #284515] |
Mon, 10 August 2015 16:55  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Well, that's not exactly new. It's 9 years old now which means it could easily have gone bad.
Emery Stora
> On Aug 10, 2015, at 3:20 PM, Lawrence Harrison wrote:
>
> Ok I am not out of the woods yet but I did discover one issue affecting gas delivery. My fuel line just before the pump was sliced/marred a bit and
> you could feel the air pulsating out of the spot. I did manage to remove and replace thinking yes this is it. BUT, it stalled again. So I checked all
> the fuel lines that I could see without lifting the coach and they read SAE 30R7. By Goodyear, installed by Cinnabar. I saw no leaks. However, my
> inline filter by the tanks was looking weak, the hoses were barely pulsating. I jumped in the coach and switched the tanks to non main tank and I saw
> gas moving through the filter much better. The lines were also pulsating pretty good everywhere accept behind the in line filter. I have an secondary
> fuel pump by the tanks. Anyways, the coach didn't stall out as quick but since the tank was low on gas I switched back to the main tank and boom stall
> within 10 seconds. Any ideas on issue(s)? The fuel selector switch was new in 2006. Thanks community!
> --
> 1974 Painted Desert
> 455 upper half rebuild
> constant project inexperienced mechanic
> Grand Rapids Mi
> Always trying to learn
>
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| Re: my Eureka moment [message #284632 is a reply to message #284515] |
Wed, 12 August 2015 00:32 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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budworks521 wrote on Mon, 10 August 2015 14:20Ok I am not out of the woods yet but I did discover one issue affecting gas delivery. My fuel line just before the pump was sliced/marred a bit and you could feel the air pulsating out of the spot. I did manage to remove and replace thinking yes this is it. BUT, it stalled again. So I checked all the fuel lines that I could see without lifting the coach and they read SAE 30R7. By Goodyear, installed by Cinnabar. I saw no leaks. However, my inline filter by the tanks was looking weak, the hoses were barely pulsating. I jumped in the coach and switched the tanks to non main tank and I saw gas moving through the filter much better. The lines were also pulsating pretty good everywhere accept behind the in line filter. I have an secondary fuel pump by the tanks. Anyways, the coach didn't stall out as quick but since the tank was low on gas I switched back to the main tank and boom stall within 10 seconds. Any ideas on issue(s)? The fuel selector switch was new in 2006. Thanks community!
I had new lines and the were the good ones. I put a little (I mean very little) pressure at the filler, with a compressor. I plugged the selector valve hose. We could hear air hissing somewhere by the front tank. Of course this meant dropping it yet again.
We found a hole in brand new hose. It was almost as if it had been stabbed with an ice pick. The only clue in the otherwise new, pristine, hose was a tiny bit of white lacing that holds the outer body of the high pressure hoes.
Replaced that piece, from the AUX tank to the selector valve and all has been well. I have thought about that several times since. Was it damaged during shipping? Who knows. Something punctured a new hose. Because there is suction in the before pump line, air can be introduced, causing stall.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: my Eureka moment [message #284647 is a reply to message #284515] |
Wed, 12 August 2015 07:43 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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George, you >did< check the floor above the tank for protruding screws while the tank was down? I found a couple, which probably weren't a danger, but I took them off with a chisel anyway.
--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: my Eureka moment [message #284713 is a reply to message #284515] |
Wed, 12 August 2015 16:52 |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Senior Member |
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So are you saying if I yank the hoses off the selector valve/connection (main fuel line) plug the hose and just apply maybe 20lbs of compressed air at the filler by the drivers side I might be able to see if any holes or hissing occurs? I have pretty much figured my main line is compromised. I might try that. Thanks for the idea. Of course any gas in the line must be discharged as well huh?
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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| Re: my Eureka moment [message #284737 is a reply to message #284713] |
Wed, 12 August 2015 22:56 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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PUSH hoses off instead of pulling, works better almost every time...better for the hose, too.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: my Eureka moment [message #284748 is a reply to message #284515] |
Thu, 13 August 2015 06:16 |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Senior Member |
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Yea I know what you mean, vapor cannister comes to mind. those are tough to get hoses off without doing some kind of damage... Thanks
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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| Re: [GMCnet] my Eureka moment [message #284787 is a reply to message #284785] |
Thu, 13 August 2015 11:47 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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Yes indeed, I have that tool and several variations of reverse pliers, got mine from the Cornwell tool man. I also frequently use an 18 inch hemorrhoid pick and also a prybar-type tool with a fork in the end designed for removing plastic push-in fasteners. The fork allows me to get behind the hose end while gripping the device with the other hand and push the hose off with my thumb on the square shank of the tool. That's the best way I have found to remove hoses from plastic hose barbs on plastic devices without breaking or twisting the hose barb off. Especially on antique plastic!
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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