| Re: PowerLossProblem - Gatsbys' Cruiser is ending the year on a good note: [message #325249 is a reply to message #325172] |
Sat, 21 October 2017 09:27   |
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RF_Burns
Messages: 2276
Registered: June 2008
Location: S. Ontario, Canada
Karma:
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Senior Member |
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In 2010 while the GMC was on the hoist waiting for the engine to be rebuilt, I had the tanks dropped and all the fuel lines changed.
In 2014 while waiting to leave a rally I flipped the tank switch and a few moment later the coach stumbled, quit and would not restart. I had the laptop connected and noticed the EBL was reporting very little fuel pressure. Flipped the switch back to the original tank, fuel pressure was back and the coach restarted and drove home. Back home I dropped the tanks and found the fuel out line on the top of the tank had deteriorated, hard and cracked after only 4 years. The hose was SAE 30R7 with a date code of 2007.
I replaced all the hose with 30R9 hose and installed steel lines above the tanks.
This spring I took it for a short rustbuster run to town and proceeded to fill her with gas. Then I noticed gas dropping just ahead of the tanks. apparently I missed replacing a one foot piece between the selector valve and the fuel pump so on the suction side. It did not leak when the pump was running. This time it was SAE 30R14 low permeability hose they were stocking.
So it does not take long for non-ethanol rated hose to deteriorate.
I'd drop the tanks, check for rust inside and the condition of the socks. then replace the lines above the tanks too. Put new seals on the senders because the ethanol will eat that rubber too. Don't forget to replace the short filler hose pieces before they start leaking.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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