Here's the verdict. Forgot that I had removed the check engine light bulb awhile back so that I could pass inspection. Engine was running fine so I figured what the heck. When engine stall problem appeared I put bulb back in and check engine light was indeed on. Mechanic did the diagnostic and it threw a code (Forgot number). Told me it was either bad O2 sensors or bad Ignition ECU. Since O2 sensors were replaced @ 750 miles ago we ruled that out. THey said a NEW ECU is NOT an option since noone makes them anymore. THey called LR Dealer and were quoted between $3500 to $4300 for a rebuilt one. The mechanic thought this was a mistake but that's what is was after a double check.
I found some used ones but I am hesitant to do this because the ECU that I have is a used one from a RR.
Anybody know who rebuilds ECU's. 94 D90 Part # AMR3729 14CUX 80506A