5 months ago...car died on neice...all electicals seem fine yet car wont start.....played and piddled trying to eliminate possibilities, finally powerstage came to mind......got a new one....started right up....no problems till now......i was driving the car, tach dropped and car died....took a couple or three trys to restart......then a week later, it dies on her in a parking lot, she went to restart and nothing......seemed to be same thing as before, so i got another powerstage (getting expensive)....didnt work.....i start putting it through all the diognostic phases....no problems ascertained...then i put it through Injection System Component Activation Test....socket two...push button three times for one second each waiting between 1 and 3 seconds thing.........and the car starts up fine after this.....ive repeated this....again....car starts fine after this system component activation test..........kinda lost now, dont know what to look for...........91 940turbo