Cross flow between dual tanks
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Cross flow between dual tanks
Been crossing from back to front since I bought it. Recently I've noticed cross flow in both directions. Irritating but not critical. To stop this completely do I have to drop both tanks and replace both pumps? Do aftermarket FDM's have the same tendency for failure?
I want to replace the bed when I find a decent one. Is this condition a safety issue that should light a fire under my *** in doing the job? Hoping to wait till tax return shows up.
I want to replace the bed when I find a decent one. Is this condition a safety issue that should light a fire under my *** in doing the job? Hoping to wait till tax return shows up.
Lead Driver
Joined: Feb 2013
Posts: 5,006
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From: Roseville, MN
A bad valve in the rear FDM causes transfer from the front to the rear tank. A bad valve in the front FDM causes transfer to the front tank. So yes, replacing both FDMs is the solution.
Is it a safety issue? Depends on how you manage it. If you allow a tank to overfill it will spill gas out which isn't the greatest thing to do. But if you don't let that happen there's no issue.
Is it a safety issue? Depends on how you manage it. If you allow a tank to overfill it will spill gas out which isn't the greatest thing to do. But if you don't let that happen there's no issue.
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Thanks. That's pretty much my conclusion as well. In researching the replacement FDM's,the price difference is astounding. A range of 100$ to 500 on Autozone, and from 40$ to 1305$ on Amazon. Considering that I need two, that's potentially more than the truck is worth. Think I'm just going to live with it.
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