95 E320 105K miles. every two weeks the service engine light will illuminate. Using built in pushbutton, I get 4 flashes. I built the test box and I get 11 flashes from pin 14. I clear the codes, extinguish the light but it returns in about two weeks, have done this 3 times. I have read the results which states fuel shut off or throttle signal. Has anyone had similar, if so how did you fix?

I have the same problem (Code 4). Maybe coincidence, but it started after I disconnected the air pump. The air pump was disconnected because it would run continuously. Nothing from Pin 14 though.

Air pump? I will see if it is connected, had the car about 6 weeks other than the CEL it runs fine.