My newly installed 1990 ford festiva fuel pump DIES

https://www.google.com/#q=What+are+the+timing+marks+on+the+1990+ford+festiva

Hope this helps

It's a 25 yo vehicle no doubt with lots of miles on it and the engine will be well worn I expect.

1. New fuel pump or not I would first check the fuel pressure.
2. Have a compression check carried out on all cylinders.

White smoke is a sign of water in the exhaust.
Possibly blown head gasket.

3.5 lbs of pressure is not enough to run the car. 9 lbs minimum

It sounds like an ignition problem. Next time you are experiencing the problem, check to see if spark plugs are firing.I would guess ignition coil.

The pump should have a fuse in the fuse block. You need to check for power in the fuse block and you need to check power to the pump relay.

Sometimes there is a fusible link to the Relay. If you check the connector terminals for power where the Relay plugs in, you can determine if the fusible link has blown. You could have already replaced the bad parts and now need to restore power to the Relay.

check the timing belt

check all your fuses to see if you accidently blow and of them. more likely the fuel pump fuse is blown

fuel pump in tank, electric
many sources, just go to O'reilly's or autozone