Exellent Info. Thanx for posting. several weeksa ago,My Comanche wouldnt start & it was just out of the blue. No spark at all. My buddy "punisher" Luckily tracked down the wire going down the exhaust/firewall. Single wire with a plug on it had come undone. Plugged it in & whalah ...PRESTO. I never even knew that wire was there or what it did. Now I do