i installed a greddy full auto turbo timer with a harness instead of splicing...i set a preset and go to turn the car off and it shuts off i made sure the back of the unit was the same as the mode in the unit (ACC,IG)...ne ideas

 

Happen to me when I install my greddy turbo timer too. I believe I was playing with the switch on the back. Got to work but sold it later after the season was over and got an auto start.

 

I had this happen on my brother-in-law's DSM. Installed it using a harness and would just shut off when the car turned off. We re-installed it by splicing and everything worked. IDK, i installed mine by splicing and works fine. Maybe you should just do that, that way you know the wires are right.