Vehicle dies while driving down the road.

Why did you replace the fuel pump? Did you test fuel pressure? Test the electrical circuit for the fuel pump? Do you know how to do that? Does it have spark? Put a spark tester on a plug wire an crank the engine. What fuse an relay are good ,fuel pump .

1995 Oldsmobile 88 Crank No Start AGAIN Part 2 No Fuel Delivery / EASY FIX! - YouTube

A fuel pump does not need to be warmed up to work. They just wear out. If its the fuel pump that's the problem it will have to be replaced.

Was the cam sensor tested & was it found to be bad?

Was the fuel pump checked out or fuel pressure checked?

Always learn how things work & how to test them

Replace nothing until something fails

No guessing at all,diagnostic testing, if you like
that langauge

Failed Fuel Pump--my guess

Any kind of lights on dash? Check engine? anti theft? oil/gas?

My 1997 Buick Lesabre Custom died on me when I was on the road. Turns over easy without start?

upper 02 sensor run on a loop till the engine gets warm then it reads the sensor get you back on the road fast it will work better if the engine is warm when you take out the o2 sensor

If you have good fuel pressure. Check for spark at any plug while cranking, If no spark, also place a screw driver on an injector and listen to it while someone cranks it over. If you have NO spark and NO injector click - crank sensor needs to be replaced. 95%
other 5% hmmm wiring problem on / near crank or cam sensors, theft system active, dead pcm.......

ignition coil pack it intermitten.

also check the crank sensor and the main crank pulley, this is where the engine gets its firing orders from

first check the alternator and the drive belt then check the timing and the crank sensor and
Try “autozone.com” or your local library for diagrams and step by step instructions.

I would replace the crankshaft position sensor AKA CPS