I have a 2000 Durango 5.9L and it takes excessive cranking to start. I hooked up a fuel pressure tester, it has 55p.s.i. running which is within specs. My problem is when I turn the truck off, fuel pressure drops right to zero. I am thinking fuel pump, or if it has a seperate fuel pressure regulator I am not sure. Any help would be appreciated thanks.

 

the antidrainback valve is gone, it is part of the fuel pump so in order to replace it you need to replace the pump, you can turn the key on and let it prime before starting and this should stop the excessive cranking

 

Just went out and turned the key and let the fuel pump energize, and it started right up! Thanks! Its the wifes truck so I will show her the process, but you now how woman are, at least my wife. Show her today and she will forget tomorrow. Lol

 

lol i understand, and if you want the problem to go away you can replace the pump, you have to drop the tank to do this tho.