Hey, guys!
Big fan of this site. Learned so much just from reading the first 1500 pages of the Ask a Question Thread (I accomplish much at work). Unfortunately, I need a little bit more help.

After Jeep sits for a night, it takes two tries to start and the second try it cough and sputters for a few seconds. 40 psi at prime. So I'm thinking leaky injectors. I replace the o-rings. No relief. I pressurized to 40 and pulled the rail. Set the injectors tips on paper towels at about the same angle as they are in the ports. A few drips from the 1, 2 and 3 cylinder but nothing crazy and it stopped. The fuel pressure then proceeds to steadily dive to under 20 psi over about 30 minutes.

Is the leak from the three injectors causing this? Or do I have a leaky check valve as well as the three injectors?

I'll say thanks now but you know I'll say thanks a million more times because you guys save me so much head ache (and money).

 

If the injectors stopped leaking but the pressure still drops, the problem is elsewhere. If you don't smell gas when you stand near the jeep, it's probably something internal like the check valve.

 

I'm going to second the check valve in the fuel pump. You can. Before starting turn the key to on for 4 or 5 seconds. Turn the key off. Then turn the key on for another 4 or 5 seconds then crank. This is the poor man's prime and works almost every time for this problem

 

Thanks, mates! It does seem to be the check valve. Poor man's prime it is until I can splice in a new one.

I appreciate the help!

 

it's not a detrimental problem. if you can live with it I would until it's time to replace the fuel pump.