Hi, I'm new to this site and this vehicle as well. I purchased it with 106,000 mi., and a number of problems. I am hoping that someone can shed some light. Besides the low speed firing of the ABS system that is bugging me, I am pulling numerous codes on bank two for random misfire, cyl 4,5,6 misfire, and rich condition (5 codes). At one time I was pulling a lean condition but that was before I replaced the plugs. All the other codes were in the system before I tuned the vehicle. The engine doesn't make a ton of power, it shakes a fair bit at idle, and only pulls codes when it is idling not on the highway. (if I reset the codes while on driving, they dont come back until it has idled some) Yes, I replace a set of Autolite double platinum plugs with a set of Bosch single platinum plugs gapped @ .045". I also replaced the aftermarket wires with a new set of Duralast wires from Autozone. From what I understand, the Bosch plugs disagree with the 4.0 SOHC motor; but I have never seen a set of plugs set off an OBDII misfire code unless something else was wrong. The last plugs were gapped @ .045 as well, I didn't think that the Ford coil pack could fire across a .054" gap consistently and that the plug gap that I got from Autozone was dislexic. I can't imagine that aftermarket wires would contribute to this problem but I am open to suggestions. I don't have any reason to suspect the charging system or battery however the battery weighs less than my head so I don't think I will be keeping it for too long, even though I haven't had a problem with it yet. I plan to swap in a set of Motorcraft S400 plugs gapped @ .054" unless anyone has some personal experience to convince me otherwise. I have read that the V6 cylinder heads are prone to cracking between the valves, but why would I get all 3 cylinders reading misfire? I expect to disasemble and clean the IAC with carb cleaner which may reduce the misfire at idle. I am currently getting bad gas mileage (15-18 mpg highway) I expected better.