That number on the MAP means either 2 or 3 BAR, can't remember which is which off hand, easiest way to tell injectors is to look at colour greens bosch 803's whilst light blue are 400's, I suspect your car will have the former or the Siemens 55LB equivilant.

Fuel pump and fan wiring should be checked for safety sake and ideally rewired, I don't think this is your problem though as you say when switched off and started again it's ok till next time, which indicates management problem hence me saying overboost but as said an incorrect map sensor will also cause this problem along will incorrect fuelling.

Martin