Coil or plug or ...
Something occured in the last 2 days that might help give some clues to my issues. So MCSF been perm on for about a year now ( beep on start ), flies the MOT emissions so no big issue, whenever I cleared it, it ALWAYS comes on on thrid journey at around 5km into journey, so just when heating up, I can almost draw a line in the road where it will come on. Anyway never any loss of power, just lumpy idle and bit bouncy during those 2nd gear traffic jam crwals - so just left it.
Since its got sub-zero, in the time between getting car out of garage and left idle whilst getting kids in and buckled up, MSCF light flashing and beeper going off periodically. So I guess this is saying too rich do something, soon as I roll, it goes back to perm light as before.
Does this new info help diagnose, code reader suggests a miss, but I'm sure its more than spark or coil as any high load would also cause a miss and it does not if flooring up hills etc once moving it never skips a beat.
As above on idle it does bounce around 750-900 and can feel misfire now and again, but this latest MCSF failure when sitting for 30 secs coming out of a cold garage does that help pin anything more down ?
There's nothing in the dark that isn't there in the light ..... except fear