Fuel Starvation Problem

[qmcdugan]

First let me thank everybody for the input. it makes a fella thinks he'snot alone.

Well it worked out a whole lot better than I thought it would. The Lord was good to me dispite my doubts. First I ran the truck and got a pic of the inline fuel filter near the Carb ( an eye dropper or two in the filter ). And pics of the hose and tank as they where.

I'll got my big gas can filled and run the truck off that to see what would happen. The Carb see thru fuel filter, filled up about 1/2 and during high RPM and Revs it filled to 3/4 full or better. Replaced the 6 feet of fuel hose from the steel tank line to the other steel line that leads to the pump.

Thank the Lord it ran the same way as on the gas can!!!! Once I got to a place where I could blow the bugs out it....

Weooo , she's back to the Rompin Stomping tire bruning ( only once ) MACH 1 powered mean green Cheby eating machine that I knew I had. And the only exhaust note that is sweeter is my 95 cubic inch HD with Mama onboard climbing a hill somewhere along Hwy 101 south of Reedsport. But the F-100 will keep ya warm and dry.

Now if I could just have the $ to get the steering frimed up a might. Enjoy the Pics! Oh and keep yer foot out of it on a turn.

Comming back from my test drive I was sittin at the light waiting to make a left turn. Well the traffic just kept a coming and the light was about to go yellow when I made my turn. Wouldn't ya know there was one of our finest sittin 3 cars back and My wheels broke lose, at not a good time. I just slowed and pulled her over and he of course pulled in behind to have a closer look at this fine truck of mine... Minutes passed and he came back and handed me a ticket for having an expired proof insurance paper. "I know", he said, "you were tryin to get out of the intersection and make your turn. But be more careful or get some rock back there". As he pointed back at the box... I'll do that.

[basketcase0302]

This is such a good thread I just had to bump it back up to the top! I am having a similar fuel starvation issue at present...but my symptoms only occur when going up a fairly steep grade or hill! On flat straight roads under heavy acceleration, there's no sputtering or almost completely stalling like it's doing going up hills.
I'm thinking my Motorcraft 2BBL might have a float issue, (but if it is a side hung float that wouldn't jive would it)?
I'd put a new fuel pump in two weeks ago/cleaned the fuel filter yesterday/ and had adjusted my choke and idle last week (idling at almost 2K for 10 minutes after starting). So I was able to get my choke/breather heat riser and idle working good. I went back this morning and adjusted the idle back up slightly in hopes the linkage rod to the accelerator pump wasn't getting enough stroke? I'll know in an hour or so when i drive it...
Nasty weather here today...maybe tomorrow I can revisit all my fuel lines/look for the condition of the fuel tank sock and what else guys?

[Dragon]

A carb tipped in any direction affects the float level. Too high and you are going up hill the bowl vents are behind the float fuel goes up the vents then down into the barrels.

[basketcase0302]

Thanks guys.
The odd part is the trucks been on some easily 40 degree inclines or hills since I'd moved here with no trouble at all?
I reversed the carb idle adjustment that I had done last week and it seemed fine this afternoon for the 20-30 miles I drove it. But it had really only been acting up at highway speeds, (55 MPH) while climbing interstate type inclines. Maybe tomorrow I can put a few interstate miles on her and see if the problem is still there.

[Dragon]

That sounds like the float is too low and the carb goes lean. The faster you go the faster fuel leaves the float chamber the more likely the jets get uncovered when the float is set too low.

[basketcase0302]

Dragon on Tue Jan 25, 2011 7:18 pm
That sounds like the float is too low and the carb goes lean. The faster you go the faster fuel leaves the float chamber the more likely the jets get uncovered when the float is set too low.

Dragon, thanks again. I haven't had the time to get it on the highway to confirm if the issue is still there or not. I believe I've got a gasket set for the carb if I need to check the float. I know I've got three more Motorcraft carbs also.
I also coulda' described the symptom a little better. Once it stumbles..I'll let off the gas pedal/then feather the pedal back down / it will then accelerate-while still trying to stumble.

[Dragon]

That sounds low on fuel.

[sacramento_ford]

sounds like my truck, new distibutor, coil, plugs, timing set, new carb and dam thing stsarts and stalls. i always felt it was odd it would die when i go into dips in the road

[Dragon]

Fuel level problem most likely though it might be a wire with a bare spot on the bottom that touches when the truck dips.

[qmcdugan]

Update:
Last year about feb mar time frame:
It began to run poorly toward the end of Feb 2010 and so was stuck trying to figure out why it had started running poorly again. Gas tank is in need of replacement. Ordered Feb 26 2011. The contaminants (rust particles) foul the pump and restrict the flow to the carb. This results in a fuel starvation problem and poor running. The fuel filter just before the carb keeps the trash out of the expensive Edlebrock carburator. Cleaning and re-sealing the tank are an option, but one has to have the time, patience and warm garage to do so… I kept the battery up and the engine started once and a while till I could re-new the registration and be satisfied that it would run well enough to get the trash (pilling up in the box) hauled away to the dump… Fuel level in the clear fuel filter is good (about ¾ full while running) so the problem with contamination is apparently intermittent. When restricted it shows up as a relatively low fuel level in the filter (about ¼ full while running) and of course in the poor running of the engine. Initially (by the PO) the filter was between the tank and the pump. Following new fuel pump install I added another filter between the pump and the carb. The result was a fuel starvation problem. Sooo I removed the filter between the tank and pump. With the single filter between the pump and carb, the flow and resultant psi is increased and the engine of course does much better… I wonder, is the pump so designed, that the suction side is simply less capable of drawing the fuel well enough through an in-line filter (other than the screen at the bottom of the tank) and then getting the fuel past the 2nd filter (just before the carb) with enough psi to keep the carb adequately supplied with fuel?