1992 Nissan Maxima engine problems

Brakes pull to one side pads have been replaced problem still occurs. Engine is noisy and rough. Crankshaft was destroyed while driving engine had to be replaced. Engine makes a knocking noise. Heat from AC would cool down after 15 minutes. Rough idle. Steering wheel shakes vigorously at highway speeds and during braking. Two bolts from exhaust manifold broke while driving. Old engine hesitated and the replacement does the same. Sometimes there is a slow acceleration.

Engine shuts of intermittently and without warning for brief moments (5-10 sec.) sometimes in isolated single events, sometimes in clusters. Engine completely loses power then returns. Dashboard and radio continue to work as if it is not electrical. Feels like a fuel delivery problem. It's very scary when it happens on the freeway or when pulling into traffic! No codes show on computer diagnostics. Replaced fuel filter and computer.