I bought an old box 98.5 24 valve. It had a "bad" injection pump on it so the guy let it sit for 2 years. Long story short, I bought it for next to nothing. I found a used injection pump to make sure the truck runs. We swapped pumps and boom, fired up. The lift pump was not putting out great so I changed that with a ty unit. Now for some reason, the lift pump will not activate when the truck is being cranked. When you let off of the key, the pump comes on and fills the filter housing, but will not run while it is cranking. There is no check engine light. I am trying to find a scan tool to see if there are any codes but so far no luck. I have a smarty for a common rail but I assume it will not read the codes. Any help is appreciated.