Another dual fuel tank question

[Jmackk]

Ok 86 f250 dual tanks, when I have the rear tank "on" truck runs fine, if I switch to the front tank the truck dies????? I thought it could be the pickup tube rusted off(have not pulled sending unit) but Ill fill up front tank fun down the road maybe a mile and then she just dies, and wont fire back up until I switch back to the rear tank. Am I looking at a sending unit? Selector valve? Blockage in the line?

 

[lindstromjd]

Switching valve down on the framerail would be my first look.

 

[79jasper]

Or bits of the shower head are in the feed line of the sender. Or at the connection to the selector valve. (The 90°)

Sent from my USCC-C6721 using Tapatalk

 

[theguruat12]

Blow air back through the lines with the selector on FRONT. If it runs fine for a while, then yep, blockages. Most likely in the elbow where the feed line for the front tank connects to the selector.

 

[dakotajeep]

Or bits of the shower head are in the feed line of the sender. Or at the connection to the selector valve. (The 90°)

Sent from my USCC-C6721 using Tapatalk

This is great advice!!! I chased a fuel supply problem for months. It ended up being pieces of the shower head had gotten lodged in the selector valve and wreaked havoc on my fuel supply.

Thad