What system did you get?, is it for a Toyota? The one that I have, and the ones have helped install, plug into the ignitor w/2 wires, and completely bi-pass the stock coil, using the Jacob's coil instead. You may want to give <a href="www.jacobselectronics.com/" target="_blank">Jacob's Electronics</a> (now owned by Mr. Gasket) a call, and talk to a tech. You probably need to get the secondary trigger for everything to run right.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed