is my injection pump going bad ?

[itsunday25]

k to start off i got a m1010 its hard to start. when i am driving it will have power and then lose power. there is fuel in gule of the engine. when it starts to runing bad i shut it off and wate 10 min and its fine for another 2 miles i changed the fuel filter new retern lines. i dont know what to do can eney one help.

 

[ranchhopper]

Take the fitting off the top of the IP where the black return hose is attached if you get black residue out of it your pump is going bad.There is a plastic washer in there that starts to degrade and starts clogging the return line at the check valve.

 

[lavarok]

there is fuel in gule of the engine.

leaking ip or leaking hose.

try to figure out which and you'll know what needs replacing.

 

[landry1]

I have replaced all injectors, fuel pump, injection pump, and tuned injection pump to make it run good. I have been through what your about to deal with... any questions pm me

 

[K9Vic]

My M1010 is doing the same, just changed out the IP and it is now surging and not having full power. Likely an air leak, but I have not been able to find it. I have a Stanadyne spin on filter system with air bleeder, new filter and electric fuel pump. I am about to change all the injectors and lines with in that system. The only other thing that I can may think of is if the lines for rear heater system is bad and that is maybe where the air leak is. I was thinking of blocking that line off as the heater does not work.

 

[K9Vic]

I changed the injectors and still has problems, getting air bubble when ever I bleed out the filter. I already had bought the injectors, so they were going to be changed anyways. Well after I completely illuminated the rear heater fuel lines from the system and bleed the air out everything seems good now. Idles normally now and ran it for 30 minutes with no surging problems. Took it for a drive and has it's power band back, still a dog compared to a pickup, but no power problems. I guess in the long run the air from the heater lines may have been a problem, but the IP was still going bad. Still good to have new injectors with a rebuilt IP for best performance,

So if you have a rear heater and do not need it, you problem may be those lines. You can block it off near the passenger front fender on the frame. There is a three way splitter that goes from the fuel tank to the fuel pump and to the rear heater system. I just used a cap from the lines that were already there for the heater.