My 99 24V has a hard time starting when the nose of the truck is parked uphill. Sometimes it starts, runs for two seconds, then dies. Then it must be cranked for 30 seconds or so before it will restart and idle. Without fail it starts if I park level or nose downhill. I have 12 PSI idle, 8 WOT with comp off, 4 PSI WOT Comp on level 5.

At first I thought maybe leak in LP system but no leaks. Can bad injectors cause this problem.

Replaced VP44 and LP 30K ago, no changes in fuel other than ULSD, normally purchased at Flying J.

 

Do the 99 models have the rubber return line that allows air into the system when it become porous. Find the rubber hose, look down at the return line between the block and firewall by the drivers foot-well. Follow it from the pump if you need to. Start the truck and watch that rubber line.
If it`s blowing bubble`s you know why....

 

No leaks in the return line. I sprayed with soapy water, checked it dry, wiped it clean, air tight!

 

add about 10 gallons of fuel to see if it is a bad sender or fuel mod. in the tank

 

scroll down to the fuel lines and read...



http://www.fostertruck.com/dodge/default.htm

 

This uphill starting problem has been going on for two months now. Fuel level in tank does not change the occurance of the problem, just uphill starts.

Can leaky cracked injectors cause this problem, or is it most likely a bad fuel line somewhere? Do those Vulcan Big Line Kits replace all of the lines that could be causing me problems? I am ready to upgrade my fuel system, do the FASS or Walbro systems come with replacement lines as well?

 

I've never encountered any 24 valves with the rotted fuel line problem like the 12 valves but you obviously have a leak in the fuel delivery system.
It doesn't have to leak fuel out to suck air in.
The way I find fuel system leaks is to pressurize the tank, 10 psi max, with compressed air then go hunting.

 

This little gem will show it`s ugly head with the eng. running.
The return line has pressure, the hose will blow bubble`s you can see.
It`s the easiest one to diag.

 

Tomorrow, I will go Leak Hunting. A reply will follow as soon as I find one.

 

Bigblue, I had the same problem. Last summer, every weekend we took the boat to the lake, the parking lot was on a big hill(truck/trailer pointing uphill). My wife would drop me off at the dock, and it would have a hell of a time starting, just like your problem. Turned out to be the water separator valve leaking, so I went to cummins and put a new one on and haven't had a problem since. Might be worth checking before messing with those fuel lines.

 

No luck yet on finding leaks outside the High Pressure System. Water/Separater valve is good, shrader is good, hoses look good.Looks like I'm gonna spend next saturday pulling injector tubes.

 

Have you tried the overflow valve? Mine was causing hard start issues, no matter which way I parked.