I've been fighting intermittent starting problems on my 1998 3.0L Ranger. Note that this is the **RETURNLESS** system, where the regulator is in the tank. The truck cranks fine but sometimes won't start, sometimes starts but idles poorly, and sometimes starts normally. After troubleshooting, I discovered the problem is related to low fuel pressure. Here are a few examples I witnessed while monitoring the fuel pressure at the fuel rail schrader: 1. Truck starts normally at 62 psi but the idle then drops as the fuel pressure gradually drops to ~40 psi and then the idle suddenly returns to normal as the fuel pressure jumps back to 65 psi. 2. Truck starts normally at 60 psi, but then the idle gets much worse until the truck is barely running as the pressure gradually goes to ~20 psi but again suddenly jumps to 65 psi. 3. Pressure stays at a constant 51 psi but truck won't start despite numerous attempts. One of attempts to crank the vehicle eventually gets the pressure to return to the 60s and the truck starts right up. 4. The truck often has good pressure and starts normally. Key items to note: A. Fuel pressure or stalling has never been a problem once the truck is running. The pump runs completely reliably once stable after startup. B. I have jumpered around the inertia switch and completely removed it from the circuit with no change in behavior. C. I swapped the fuel pump relay and the adjacent wiper relay in the fuse block with no change in behavior. D. I have been able to hear the pump running (through the fuel filler neck) during a poor idle event. I suspect all this leads me to the replacement of the entire pump assembly but want to be as close to 100% certain as possible before I spend a couple hundred bucks on my truck. The one last item I think could possibly cause the problem is the pressure regulator. However, I CANNOT locate a replacement. Because Ford went to the returnless system in mid-98, every regulator I find is the fuel rail mounted one for the return based system. But my truck was built in June and does not have a return line to the tank. If anyone has experienced this problem PLEASE come forward with your findings. I am very close to just buying the entire pump assembly.