93 3.3 Grand Caravan

I know this problem is going to be difficult to diagnose but here goes. A
little history: I've been having a problem with the car cranking and not
starting and then would turn off the key, try again and it would start.
Fuel pump, replaced, fuel rail replaced. Someone suggested it might be a
relay going bad. I purchased two but have not installed them yet. This
weekend I was driving about 60 mph and the car just died. I put it in
neutral, turned the key off and then tried to start it. It started and
everything was fine (did not do it again). Could this also be a result of
one of the relays going bad or am I looking at a different problem ?

thanks for any advice,