My 2.4SE auto developed a problem at the weekend, and I'm at a bit of a loss where to start while I wait for the diagnostic tool to arrive... Basically on Saturday it started to develop a bit of a cough, nothing major, then at a junction at idle the revs suddenly dropped before resuming normal service. Nothing major and no warnings given. Wife took the car out Sunday and it stalled several times on her at rather inconvenient moments (on pull away) but I couldn't reproduce on the drive. Later in the day, it conked out on me completely and the "INSP" warning started flashing on the computer, got it going and home after which it sat and idled beautifully for 15 minutes at a time, then suddenly either drop revs and have a lumpy idle for 2-3 seconds, or it'll cut dead, as though the ignition has been switched off. After lumpy / cut off and restart it'll again run beautifully till some random moment it'll have another paddy. About the only thing I have noticed so far is that there is a high pitched hum that I think is coming from the throttle body - is this normal? Any thoughts?!