I'm completely stumped and needing some help. I have a 2006 Ford Fusion SE with 96,000 miles. Last weekend it began running really rough, so I got it to an auto parts store and ran the codes. Cylinder 5 was misfiring. The ignition coil was cracked. I replaced the spark plug and ignition coil and tried starting the car. It started, but was still idling really rough. It ran for 10 seconds or so and then died. Then it would only crank, never fire. After reading up on this forum and others, I saw that it's common for the PCM to go bad when a coil goes bad. So I removed the PCM, and sent it to Circuit Board Medics. I also bought 6 new spark plugs and coils. When I got the PCM back, I changed out all 6 spark plugs and coils (yes, even the new one), reinstalled the PCM, and tried to start the car. But again, it only cranks and won't fire. I'm getting fuel and air to the engine, so I just need the spark. I really have no idea what else to check. At this point I'm wondering if the PCM repair was faulty. The company stresses that they program the PCM and so I don't have to when I receive it. It's also not the security system - when I turn the key to 'on' the security lights up for a few seconds and then turns off. Any other ideas? I'm completely stumped right now. Thanks for any and all help!