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Old 08-12-2012, 08:04 AM   #81
Journey not Destination
Dieselboy's Avatar
Joined: Sep 2003
Location: Port of the Gasparilla
Oddometer: 1,161
pressure in main tank

First day of use was great!

But Day 2 has me perplexed. I think pressure in main tank is preventing flow from AdvTank.

I'm now in New Mexico. It's 100.

I stop to fuel with 9 miles to empty. Open the main tank, pay at the pump, pump only 1.2 gal and she starts to overflow. I pull the pump and slam the lid. Checked the Advtank and I can see gas. I had the main tank open for several seconds (perhaps longer) before I pumped. I suspect that once opened the AdvTank started to drain in.

I pulled the seat and looked at the hoses don't think they were pinched. The main tank was under positive pressure when I opened it to pump fuel.

Read through THIS THREAD but still am unable to answer the following:
Where is the purge valve? Why is the main tank not venting? Heat?

EDIT; So re-read the thread and believe I need a new vent valve with check ball. Or just run a line from the Advtank to ground.

EDIT EDIT (kind of like PPS): In the end, I simply removed the check valve all together. Even with a new check valve I was having pressurization issues. Once I removed it no problems. I ran thousands of miles with it this way. I was completely happy at that point.
The Adventure Continues

Dieselboy screwed with this post 04-29-2013 at 11:32 PM
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