Can not figure out computer code on 1991 240sx

[Sam French]

Hello people this is my first time posting. I am troubleshooting my 1991 240sx automatic. It is intermetingly stalling and CEL lights up. Sometimes it will just start back and keep running while moving. Sometimes stalls when stopped and can start up. Yesterday it stalled while backing up and while going from reverse to forward it stalled. It would not start so I let it set with the hood up. I tried it a few times it would not start but I finaly got it running and drove it about 30 min back to the house with no problems. I was stranded for about 25 min. I am using the checking ECU in the FAQ. This is what I am reading from the ECU.

slow-1 1-quick

slow-1111

quick-11111

it repeats this over and over I can not figure out what the code is.Any help would be appreicated. I am using mode II with the engine off. Thanks in advance. The car has 218k on it.

[vancouverbc]

11 crankshaft position sensor 45 injector leak or fuel mix too rich for some reason.