It sounds exactly what my Mark VIII did when the crankshaft position sensor crapped out. I also thought it was the fuel pump after I (incorrectly) replaced the sensor and wiring.
I will give you a set that were cleanly removed off a 2008 4.0l AUTOMATIC last month. Just pay Shipping and Handling!!! DM me your zip and I'll research how much to ship; handling is $0 since the trash hasn't ran this week so I have plenty of boxes, eh