ok ive heard that its a waste spark that only the intake side fires on the power stroke and the exhaust side fires on the exhaust stroke to burn excess gasses, then i also heard that both fire on the power stroke to get a better burn. who is right?
I copied and pasted a response from another thread posted on 2.3 tech, Hope this answers your question. rgosulliv Founding Member Join Date: August 2001 Location: Lawrenceville NJ Posts: 426 yes it is true. from 90-93 the 2.3L had two plug per cylinder. if your next question is why then heres your answer: -"In the DIS (distributorless ignition system) system, each coil fires two spark plugs at the same time. The plugs are paired so that the plug on the compression stroke fires, while the other plug is on its exhaust stroke. The next time the coil is fired, the plug that was on the exhaust strock will be on the compression stroke and the first one will be on exhaust. The spark in the exhaust cylinder is wasted, but little of the coil energy is lost." from chiltons manual. -Ryan __________________ 1993 Mustang LX 2.3 Turbo 2004 Mustang Mach 1 Central Jersey Mustangs and Fords
thanks. thats what i thought, but a friend thought that only the intake side fires after the compression stroke so he thought changing the exhaust side on the limas during a tune up was worthless
In proper operation, exhaust side fires 10* btdc, and intake side fires 10* after. When it fires on the exhaust stroke it does ignite the exhaust, but that causes it to fight your compression, sputter, and just plain screw up. If they did it when it was 10* btdc on exhaust stroke, it would be better, but it would still rob hp.
huh. Damn. I guess it depends who you talk to. I know my car was running rich too, maybe that's why I was getting the acting up situation. I thought that only the dual coil packs workd that way. (as opposed to two individual coil packs)
