Engine/Transmission (1998.5 - 2002) another hard start condition

[HD-J78]

So, I've been fighting this hard start thing since I replaced the VP44 and lift pump. At first I thought it had something to do with the fuel tank/level. When parked up hill it would crank a while, like maybe 10-15 seconds then start just fine. When it first started doing this it would be when the fuel level indicated below half full. Then it started with fuel level just above half. Then yesterday I parked up hill again after filling the tank and this morning it did it again. So, I don't think this has anything to do with the fuel level in the tank? I replaced the water drain valve thing twice, replaced the return banjo fitting thing, pressurized the fuel system multiple times and did not find any leaks or heard any air leaks. I even ran the lift pump first before starting and this did not help. Maybe I should try two then three runs of the lift pump until it does not have any delay starting. I kind of doubt the problem is in front of the lift pump since when it starts just fine with no rough idle or sputtering or anything. Just cranks a while to start. I can leave it parked on level ground over 24hrs and all is fine. Also parked down hill no problems.

2000 Cummins 4x4 with 5 speed. 210,000mi.

Thanks.

 

[JKreiss]

If it's hard starting uphill it means your fuel is running back to the tank. Double check all your fuel lines, even the return line, for evidence of leakage. My 99' did the same thing. It was leaking at the quick connect plug on the return line. It's the first thing i'd look into because it's free.

 

[HD-J78]

I figured I had a fuel drain back problem. Which quick connect plug on the return line? At the engine or at the tank? Like I stated I can't find any leaks anywhere:-( even when pressurizing the tank.

 

[JKreiss]

Luckily for me it was bad enough that there was some wetness on the line. There's a couple fittings at the end of the block where the connection for the return lines are. Check the back of the block as well, there's a fitting there with a line that goes back to the tank. The book calls that fitting a fuel drain manifold. It's just aft of the fuel filter bowl, and connects to the return line going back to the tank. Just something to check. Sorry i wish i could help more. There are so many threads on this subject it'll make your heads spin. When i had my issue i just started simple.