4.0 engine stalling

[Co-MAAAN-cheee]

I have a 1988 with 4.0 and auto trans. 140k miles.  No modifications. I've had it for several years. I don't put a lot of miles on her. Did pretty much all of cruser54s tips. Even the c101 delete. I think I replaced almost every sensor.  She's been running great for 2 years. For the past few months the engine dies without warning. Always happens while driving. Usually at slow speed in a parking lot. No rough running or any other symptoms. Just turns off. It'll start right back up every time then won't happen again for days or weeks. I think it might be happen while braking, but, its always a panic moment so not certain. I have noticed a loud noise coming from the fuel pump in hot weather. The engine has that common rough sound at idle. most think its a bad lifter, but, nothing has changed related to that since I bought it. 

 

 

Ideas for What should I check first?