could my ip be going out

[69dieselfreak]

im running straight diesel and i have eratic fuel delivery ill be crusing down the highway and i go to get to a hill and give it some fuel and just falls flat on its face and them picks back up again it does that quit frequently but
after my carrier lift pump failed i robbed the electric pump i got from napa rated 7-9 psi i think but i moved it to the frame rail and no change could the ip be going out or is fuel flow my problem
there are no fuel leaks found fuel system looks fine
but the ip looks to be leaking fuel from some where pretty dirty

 

[EMD_DRIVER]

Have you done a fuel flow test, using the schrader valve on the filter head? Also, when was the last time you changed the fuel filter?

 

[69dieselfreak]

no fuel flow test what do i need to get to do that
fuel filters have about 13000 miles on them that might be a good idea to change them

 

[EMD_DRIVER]

no fuel flow test what do i need to get to do that

If you have a tire valve cap that will remove the stem, use that. Turn your fuel pump on and see if you get a good quantity of fuel out of it. Someone else will chime in, with the proper amount. Make sure you have a hose hooked to it, so you can catch the fuel in it.

fuel filters have about 13000 miles on them that might be a good idea to change them

What you described, sounds like mine when the filter is clogged. I also have the fuel filter light in my 93 and it coming on coincides with my truck acting like you described yours doing.

 

[69dieselfreak]

ill give those a shot im probably going to try changing my fuel filters first i cant emagine them being clogged unless ive got a bad batch of fuel whitch is possible
but when i run wmo im filtering it down to 2 micron so thats definatly cleaner than the diesel thats going to my ip

 

[tractorman86]

how did you hook up the lines from fsv to the pump? could be sucking air somewhere back there.

 

[6 Nebraska IDIs]

Well its most definitely a fuel pressure or volume cut causing it to do that. Because of how you say you hit the gas and it'll fall on its face first before taking off. Do what you've said you're going to do and change the filters, my bet is that WMO has killed one of them. I seriously doubt its an air problem. Air is more like a periodic sputter with no reason to it. Your problem is directly related to fuel loss when you press on the gas.

 

[69dieselfreak]

how did you hook up the lines from fsv to the pump? could be sucking air somewhere back there.

i cut into the steel fuel line i didnt want to F with the plastic fuel line

 

[69dieselfreak]

Well its most definitely a fuel pressure or volume cut causing it to do that. Because of how you say you hit the gas and it'll fall on its face first before taking off. Do what you've said you're going to do and change the filters, my bet is that WMO has killed one of them. I seriously doubt its an air problem. Air is more like a periodic sputter with no reason to it. Your problem is directly related to fuel loss when you press on the gas.

i forgot this
well it likes to sputter out when i first start up and then fires back up and seems to clear out until i put a load on the engine

 

[6 Nebraska IDIs]

Hmm, now that sounds like air...

 

[69dieselfreak]

ya but whats making me think
is where can it be coming from im at a loss
tomrrow after work im going to pull it in the shop and look around and try to diagnose the problem thanks guys for all the info keep it coming

 

[Agnem]

Put a clear line on between the filter head and the fuel returns. If it's air, you'll see the bubbles. Could be fuel starvation also, that is no air, but a lack of fuel (vacuum).