I have read for hours on end on this forum and I still cant get my EEC to enter self test mode. I have tried using a analog multimeter,test light even watched my check engine light. Yes my 88 Hatchback has a CE light that actually lights up and no its not a Cali. car. But it does me no good only time i see it is while i am starting my car. Does anyone know of any certain reason why the EEC will not enter any form of test mode (chip,blown fuse/fusable link ect...). I have tried for a while now with no luck. If anyone else has had the same issue let me know please. My car would start idle rough for 3-5 sec and then die. After letting it sit over night it started but ran very rough. After cleaning MAF IAC and tracking down the vaccum leaks it seems to run much better. However it back fires when down shifting or decell. only in lower RPM usually under 2500rpm. Also a knock which I have yet pin point mostly when I down shift or low rpm decell. but will do some times when i rev the motor. I would really like to get to the bottom of this EEC problem so I can have a better idea of what is wrong with the motor. Any help would be greatly appreciated. And the sooner the better. THANKS for your Help.