Jeep died today...

Hoping that the experts on here can help me out. I have a 1994 Cherokee Sport, 4.0L, Auto. My daughter was driving it on the highway today and it died. She says it sounded kind of like "a release of pressure". Jeep cranks but will not start. CPS was changed about 4 months ago. Thought it may have been the fuel pump, but I checked fuel at the valve on the fuel rail and it sprays fuel very forcefully. It is getting air. I noticed that the spark seems weak when I held a plug wire against the engine. Any ideas or suggestions?

Thanks,
Jeff

Genuine Jeep CPS, or some cheap crappy "Lifetime Warranty" part ?

Got it from Advanced Auto, so it was an aftermarket one. Has been running great since I replaced it.

Replaced coil and it started right up. Thanks for your input. Hopefully, no more problems....

Jeff