my m35a2 keeps dying

[dustinwynn]

my truck will run fine till i get out on the road and get in 4th or 5th gear. Then it is like it runs out of diesel
and dyes. i haif to use eather to get it to restart and it runs rough for a bit and then clears up and will run good till i try to run down the road in a high gear. the truck dose fine in 1st and 2nd in short bursts but will dye if i try to run it down the road. neeed help. thanks PS have changed all three fuel filters and a new in tank pump

 

[m16ty]

I assume you are sure you have power to the tank pump.

My deuce had a similar problem and it had a bunch of junk in the bottom of the tank plugging the pump screen.

 

[Tow4]

You might get more help if this was in the Deuce forum.

 

[Warthog]

Moved.

Have you checked the fuel line that is running under the radiator? Many times it has been crushed and restricts the fuel flow.

 

[dustinwynn]

help with my m35a2

MY 1987 white multyfuel duce will dye when i try to run it down the road in a high gear and i haif to use eather to get it to restart. it will run rough for a bit and then clear up and run good in short burst in 1 and 2nd
gear but try to get in to high it bogs down and dyes. i have changed a 3 fuel filters and the pump in the tank
and i half to eather it every time i go to start it cold or hot. any ideas will help thank you

 

[dustinwynn]

Ps should fuel run back in to the tank when the truck is not running just the switch on.

 

[RAYZER]

Ps should fuel run back in to the tank when the truck is not running just the switch on.

Yes.

 

[doghead]

Do NOT start more than one thread for your issue.

 

[Jeepsinker]

Get the truck to die again, then open the bleed screw on top of the final fuel filters with the master power switch still on and see if air comes out, or if straight fuel comes out. You may be sucking air.

Your hydraulic head may be going bad as well.

 

[hklvette]

What's the current temperature where you are? My 5T gelled on me last week when it got near 10F, and it had similar symptoms to what you describe.

 

[USAFSS-ColdWarrior]

Check your FUEL FILTERS per the TMs.

You may have ALGAE in your tank and lines and filter(s) which clogs the filters at high flow rates.

The in-tank pump is a low flow rate compared to the fuel flow at higher engine RPM and therefore more sucking of the ALGAE "wafers" against the filter membrane.

From personal experience, ALGAE is NOT your friend.

Carry on.

 

[Warthog]

From personal experience, ALGAE is NOT your friend.

Carry on.

You mean something like this?



If your truck is a 1987 USAF truck it is very likely the tank looks like the above picture.

Make sure you post your info in this thread:

http://www.steelsoldiers.com/showthread.php?79736-Late-Model-USAF-M35A2C-Registry

 

[acesneights1]

in a fuel pressure gauge as close to the IP as you can and watch FP when it dies.