ok the 86 i just bought has a MSD 6AL ignition, when its not hooked up the tach works, but when i hook it up it doesn't ( i know its not hooked up to the MSD box like it should be) but my question is how do i run the factory tach to the MSD?
I read somewhere that u needed a adapter to run some tachs to the MSD box, and others you could plug right into the tach output, but i think ford needed the adapter, but i have no idea what it is, where to get it, how much it cost, or where the hell to run the wires to
i would pull the msd wiring out, and rewire it yourself so you know it is correct. i dont know how its wired up, but it doesnt sound correct. and im assuming you mean the stock tach?