I have an 87 944 with an intermittent spark prob will start and run fine go into the store and no spark. Have replaced the dme relay. Here is the odd thing that no one can figure out if I take a piece of wire and hook to green coil wire and touch it to the neg batt terminal with key on and then try to start car it starts every time. Any help would be appreciated thanks

 

Bad coil?

 

I always thought a coil just went out but don't know much about Porsche's test shows good but could be thanks for input

 

Isnt the green wire ground? Sounds like you got some bad wiring