I have just installed a MSD Pro Mag Controller #8973 on a blown alky motor with a 44 amp mag. I do not have a crank trigger on the car which MSD says is not a problem, it will work with or without, However i have no spark. I have checked at least 5 times all of the wires to make sure they go to the proper places. I have continuity on all wires and good ground's. The unit has power and will comunicate with the laptop. I have all the settings set on default as i just wanted to get the motor to light and run. Runs fine without the box but when I plug the box in I have no spark. Has anyone run across this problem before? Is anyone running one of theses boxes without a crank trigger? All I want to use the box for is a launch retard and nothing else, so all the other wires are not used. Should be very simple LOL!!!, But I am lost!!! Any info. would be great!!! Oh yeah, the box is new, just got it last week!!!