Only thing worrying me is a friend at work who is a mechanic seems to think that it could be the ECU, little electrical gremlins are occuring such as the passenger side not unlocking when the car is deadlocked but when just locked it dies, the engine problem and the heater, if it is the ECU how easy is it to replace, where is it for a start (just in case it is just loose connections) and what or who do I need to replace it. I am still going to fit the MAF sensor I have just got, maybe get the VSS sensor and a new coil pack just in case (I can get them quite cheap) it is just if it is the ECU I'm a bit stuck.