how are things going? I have a misfire or two on my car with 160k. so far replaced the plugs, leads, coilpack, ISCV, MAF, fuel pump (a new bosch one), fuel filter, lambda sensor, compression check (all between 175-190psi). and still I have a misfire under heavy load/mashing my right-foot down. which is usually worse or much worse when my car is below half a tank. I have a bit of vacuum with my hand over the oil cap hole so i think PCV is okay and its so rusty i don't want to touch it for now. I snapped one of the screws holding the throttle body off when i tried to unsrew it lol. its made no difference though o nothing to worry about maybe.
I've a few other electrical age related gremlins but nothing as far as I can tell in the engine management has come up for a long time on my forscan setup.
I've reset the module since putting the new bits in and after a few days driving its back to what it was before. I trained in a ford garage when the focus was released but we didn't come across stuff like this as all we tended to do to them was 10k services and recalls then I left the garage in 02 and haven't really had anything to do with them until now.
If it had failed mot this year it'd probably have gone already but it passed even with the misfire. So what's the score with you?