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?