New MAF but still problems
I recently had a problem with my MAF and replaced it with a genuine BOSCH one from Emissioncontrols. At the same time I replaced the air filter (as the previous one was the TS one and not the correct V6). I then went through the ECU reset procedure and for a week or so all was well.
Tonight on the way home after ~30mins it started to be really hesitant on acceleration and then the spark plug warning light came on. The hesitancy was consistent in all gears - I would change gear and accelerate - the car would take a second to think about it and then respond. The idle also appears to be a little variable and felt pretty low.
When I came home I stopped it and left it for a while. When I started it up again the light went out.
Any ideas what it could be? Should I be worried about a breakdown coming?