Misfire at low RPM under load
I feel like I've tried everything here, and I'm trying not to just throw money at this thing. I don't have any error codes indicating a misfire, but I've had the notorious water in the spark plug well problem in the past and it feels very similar. At various speeds mostly when the RPMs are low I get a chugging feeling like it's misfiring but it's sporatic. It only seems to happen when the car is hot. I recently had an EGR problem so I've already changed the DP sensor, the EGR regulator, and cleaned the EGR ports on the throttle body to correct the problem, so I'm pretty sure it's not EGR related. I've change all 8 plugs and coil boots also. I also bought a coil and have been one by one moving it to the next cylinder. I've been through 6 or the 8 cylinders so far, but I don't think this is the problem.
One of the guys at the Ford place said to check the IAC valve. Another guy there said that the idle would be off it that was the case and it's not. I'm running out of options. I could buy 8 coils and hope that fixes it but I'd be real upset if that didn't fix it.