I have a 86 f250 6.9 c6 4x4

I bought it and haven't had a chance to really see if the pick up lines are bad or not.
I know it's got air intrusion, and leaky injectors and today I noticed the water fuel seperator leaks I think. There was a puddle under it, might have been condensation from overnight but idk.
When I first bought it, it would stalled and I couldn't get it started, my friend found out that my sending unitickup lines are bad, don't go under half a tank, okay no problem.
Today I'm letting it idle after driving over to my friends house after a very good week of driving it, and it dies. It's at 3/4 tank. So I figure let me try and crank it, nothing so I check fuel filter, empty. Awesome so I get 8 gallons via 5 gallon jugs and start fillin her up. Cranks up good, starts to idle and get rough like jumpy so I start bleeding the shrader valve, and get the air out and it's good unhook the battery starter, grab my phone from the other end of te shop and it starts getting rough. Rough as in like 600-450-600-450- stall. Get it started again after a little either(no glowplugs the controller is shot, either block heater or either) and iota doing it again, but this time I'm there, I can hold it above idle for about four minutes then it starts dropping bad and I have to mash the throttle wide open to keep it from stalling but te eventually it will stall. I parked it behind the shop after I got it going again. What do you think it is?

 

Bypass that water seperator. And bleed it out. And fix those pick tubes!

 

I don't have the time, I go four hours to Charleston on Friday and then I deploy on Monday.
I'm leaving the truck with my dad to occasionally drive else I wouldn't have just put it on the road.
And it's at my friends house.

Do you think it's just alot of air in the lines?
Would cracking an injector and bleeding the shrader help?

 

Lift pump?

 

It will run if I put some throttle in it tho, and now the fuel filter is staying full, I believe.

 

Yup.
Lift pump.

 

I spoke too soon, now it won't run. I can get it to start but after that nothing.
Lift pump?

 

So I installed a new lift pump.
The updated one not curved, and now I'm not getting any fuel.

 

Do you have fuel to the lift pump?


If so, you may want to take it back out and make sure you didn't get the lever on the wrong side of the cam.
If you did that, you broke the lever and the pump is junk.

I like electric pumps.

 

I ended up taking it out and putting it back in and she is running now, but I have much worse air intrusion symptoms now.

It'll start and run really rough until it dies, unless I have a friend bleed the shrader as soon as it starts.

 

That water sep. (not the filter) is easy to bypass. Crawl under the the driver side by the tank selector valve. The steel line should have a rubber line going to the water sep. Then a rubber line coming out and going to the steel line that goes to the lift pump. Just run a rubber line to bypass the water sep. Make sure to use diesel rated. Should be 3/8".

 

Good save on the pump.
So when you burp it at the schrader valve, it's ok?

 

when I got my van it had the tiniest leak (in the fuel line, a small worn spot in the steal line), it would run fine if I started it every day but if it sat long it was a problem, I found the leak when I installed an e pump, just after the tank selector valve. it dripped, when e pump was on. fixed it..