Accord 92 Ex : Shuts off at light
 

I need to hear from someone who really knows their stuff.

Here is the problem?
transmission pulls and shuts the car off during idle (sometimes) not all of the time
the car runs fine for about 20 minutes then starts having problems
the 4 light blinks but resents and is fine once the car is turned back on.
No matter what - THE CAR WILL ALSO START UP.

The mechanic said that is definitely electrical. The car is with the mechanic now and he said, there is a fuel pump under one of the doors that needs replaced. Thoughts?

Here have been the failed solutions?
Replacedengine
Replaced Transmission
new cylanoids (2)
replaced engine and trans computer chip
checked engine harness
checked ground wire
checked sensors
checked spark pugs
checked battery
checked alternator

This is (believe it or not) my dream car. I have a toyota colara but I am trying to get the honda back on the road. Can someone offer suggestions.

THANKS!