That would require pulling off the fuel rail with the injectors still attached so you can watch for signs of wetness on the tips. That's a lot of work, plus, there are two other possible causes of loss of pressure. There's a check valve in the pump, and there's the pressure regulator on the fuel rail. Unlike GM, Chrysler has almost no trouble with their regulators, but you can try pinching off the smaller return hose by the right strut tower, then remove the clamp when you are ready to start the engine again. If that helps, instead of the regulator, look at the little rubber o-ring on the nipple after you pull it out. I had one that was slit on a brand new car, and I found one on a high-mileage customer's car. Both caused total loss of pressure within seconds of stopping the engine, a real long crank time of up to ten seconds, and the engine ran fine once it started.
As an alternative, you have a convenient test port on the fuel rail where you can connect a gauge. Many auto parts stores borrow those kinds of tools for free or rent them cheap.
I was fighting an intermittent stalling problem with my van for 11 months, and for the last month I had a pressure gauge slipped under the right wiper arm so I could see what was going on. I was surprised to see that there were times the pressure dropped to less than 15 psi and the engine still started right up instantly, (usually does that just fine when it's cold), and I had long crank times sometimes when the pressure was still up. Just the opposite of what you would expect. It would appear fuel leaking into the intake manifold causes a flooded condition when warm that results in the long crank time, and that fuel condenses when the engine cools. Raw fuel will not burn, but the air flow during starting causes it to vaporize which promotes rapid starting.
If your engine starts in a shorter period of time, say less than five seconds, I would suspect the regulator is not the problem.
By the way, I have a Dynasty too. Mine gots 4,100 miles on it!
Monday, December 6th, 2010 AT 10:22 PM