So I cleaned the IP valve on the fuel return line...

[acmunro]

IP problems

The pump is going bad. Fuel exits the injector pump and shares the common return line with the injectors to get fuel back to the tank. I had a truck the IP was going out on that I need to run. I installed a brass nipple where the IP check valve was and installed a clear fuel filter to catch the debris (to keep debris out of the fuel tank) The truck will run but the timing will be erratic. I would not do it long term but it will work in a pinch. An alternative to the brass nipple would be punching out the glass ball and using the filter. Just my .02. Good Luck

 

[Midnight Rider]

Well crap. I guess I better ask Santa for a new IP.

 

[dmilkman589]

ok so my 1009 has no valve at all. is this bad, is this why the truck smokes and is lacking power??

 

[CUCV85]

rebuild your IP replace return line valve

ok so my 1009 has no valve at all. is this bad, is this why the truck smokes and is lacking power??

It's an indication that someone knocked out the ball in there due to IP internals failing and clogging it up. Your pump may have been changed out since that modification. If your lucky though. More than likely your problem still exists as many have been told that the single most important thing to do is have that Injection pump rebuilt. It's time consuming removing the pump and can be costly 150-400.00 to have rebuilt. You can buy take off used pumps but they are a crap shoot. They are eventually in need of rebuilding as well. Once you get a injection pump rebuilt chances are you will never have to again as long as you have the vehicle. My injection pump was very scoured and had to have the advance piston in the bottom replaced. It ran me 490.00 to have rebuilt and now is a screamer. I am very happy with the results and you will be too. When you change your pump be it take off or a rebuild it's like a totally different truck believe me. Seen many rigs tired and failing miserably and bam you change the pump bingo LIFE again!
You should replace that return valve with a used or new one. Takes the prime away causing issues having no glass ball in there. Change your fuel filter is a good step to take as well. V/r J W SFC US ARMY