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When running under load engine rev"s
then slows. When you idle down engine dies if not under loadruns fine.replaced filters cleaned tank and lines new lift pump and rebuilt injector pump
 
Rebuilt in Somerset ky. Timing is correct.My thinking
something wrong with rebuild of pump.Run it in shop ran
perfect only runs bad with load or going over hill it will act
funny has to be governor in pump
 
Check that the return line from pump is not pluggged or that the rubber hose there is collapsing. this will cause back pressure in the pump, behind pumping plungers and basically not let them pump fuel. Also did the repair shop replace the return fitting coming out of the top of the pump. It has a little glass ball in it and sometimes they get a piece of the internal ring in them and stick
 
New valve in pump all new return lines flowing freely into tank.everything new or cleaned except injectors
 
Lift pump. This was first thing I replaced.checked fuel flow
to pump and it is pumping lots of fuel. Someone suggested
injectors but it should run bad all the time is my thinking
on that.I have a 1855 to can I change pumps to see if that's
the problem book says they are different but I still think my
problem is in my rebuilt pump.
 
(quoted from post at 04:31:09 03/19/14) Lift pump. This was first thing I replaced.checked fuel flow
to pump and it is pumping lots of fuel. Someone suggested
injectors but it should run bad all the time is my thinking
on that.I have a 1855 to can I change pumps to see if that's
the problem book says they are different [b:5da1d5502c]but I still think my
problem is in my rebuilt pump.[/b:5da1d5502c]
think so too, take it back to the rebuilder.
it could be all kinds of things Maybe the transfer pump on back ain't putting out or the IP is set to lean or the plungers are sticky.

I would not go trough the hassle of swapping pumps back and forth on that 1855.
 

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