Sarafusion

I just wanted to relay a fix I implimented to prevent coil packs from damaging PCMs in 2006- mid 2008 Fusion 3.0 models. A bit of background, my daughter has a 2007 Fusion 3.0. She had a coil pack fail because of oil seeping into the spark plug well and contaminating the coil pack. This not a big deal on most cars, but not this one. The failed coilpack destroyed the driver transistor in the PCM. I sourced a rebuilt PCM from one of the online sources and I have to give props to Forscan for providing the software to reprogram the PATS keys and initialize the new PCM.....But I digress from my tale, when I removed the old PCM, I noticed that it was tagged as a remanufactured one (from a now defunct company). So I did some digging to figure out what was blowing these PCMs up and how to keep this from happenning repeatedly. IE coil packs are cheap and easy to replace (at least the front 3 are) but PCMs are expensive and time consuming to swap. Here is the fix: acquire (6) 82volt zener diodes and (6) 18volt zener diodes and assemble them in pairs with their anodes connected (non stripe sides). Now take the six pairs and on the connector to each coil pack connect the cathode (stripe side) of the 82 volt zener to the wire that connects to the PCM driver circuit, connect the cathode (stripe side) of the 18volt zener to the 12v wire that feeds the coil pack. Don't get them backwards. This zener diode pair will "clamp" the voltages seen by the driver transistor into a safe range and prevent blowing up the PCM when a coil pack fails. Use 1 watt zener diodes. Cover each installed clamp circuit in some silicone "liquid tape" and you are done Im trying to be helpful, this worked in my situation but if you try this and for whatever reason cause damage, I take no responsibility .