Need Help Diagnosing Fuel Delivery Issue

[huskerfan]

Good news is a buddy of mine said i can come pull the IP off the 6.2 engine sitting on his shop floor. Was hoping to snag a 6.5 IP off the internet since i had read those give you a little more power, correct?

 

[CARC686]

You can't advance the timing enough to burn all the fuel from the big pump and it will always stink. Might be good for a turbo.

 

[huskerfan]

You can't advance the timing enough to burn all the fuel from the big pump and it will always stink. Might be good for a turbo.

Ahhhhh gotcha. Sounds like i will be sticking with a 6.2 IP then

 

[Barrman]

It might be too late. But, pull your pink wire when checking the lift pump flow with the fuel filter open.

 

[huskerfan]

It might be too late. But, pull your pink wire when checking the lift pump flow with the fuel filter open.

Haven’t started pulling the IP yet - what would your solution help us narrow down? Isn’t the pink wire the cold start advance or something? I remember reading about it on another thread

 

[CARC686]

Fuel cutoff solenoid.

 

[Barrman]

The fast idle and cold start advance both have a green wire connecting to them. The pink wire as pointed out above is what turns the fuel on or off.

My post in #24 is just following normal fuel filter bleeding procedures. If the engine is cranked with the pink wire connected and powered while the fuel supply to the injection pump is open. Air will get into the injection pump and you will be starting over again trying to get the IP full of fuel again to even diagnose your issues.

 

[huskerfan]

The fast idle and cold start advance both have a green wire connecting to them. The pink wire as pointed out above is what turns the fuel on or off.

My post in #24 is just following normal fuel filter bleeding procedures. If the engine is cranked with the pink wire connected and powered while the fuel supply to the injection pump is open. Air will get into the injection pump and you will be starting over again trying to get the IP full of fuel again to even diagnose your issues.

Well now I am more confused. I disconnected the pink wire, still nothing. Pulled the inlet line to the fuel filter, cranked and couldn’t get fuel to it. Hooked a shop vac up to the inlet line to the filter and got a little bit of fuel to come out, but nothing crazy. So then I pulled the outlet line on the fuel pump and cranked it and nothing came out. Does that lead us to believe it’s a clogged fuel sock in the fuel tank?