hiya, im no glanza expert in any case, but i am technician working at VW/audi. to break it down step by step. engine fueling is done by the ecu what needs to following sensors to do a correct engine cycle. -cranck pos sensor -engine rpm -air amount/ air temp -cooling temp -trothle pos -lambda sensor -knock sensor if any of those sensor gives a faulty ready the ecu will adapt to that false reading. after diagnostics you tell us that you have 2 faults: Map sensor and coolant temp. the coolant temp sensor gives a signal to the ecu that your engine is warm or not. this means it will use more fuel when cold readings and "less" at warm readings. try to find the sonsor qualifications of how much resistance at what temp it should give. so you can test it outside of the car. if it keeps telling the ecu that he is cold he will use more fuel. would it be enough to cause a malfunction as this.... duno cant tell.... the second is the map sensor. this measures the amount of pressure in the manifold, what is needed for a correct amount of fuel. this sensor can also be measure by a handpomp. most of those sensors have a liniar volt measurement. ( like: 0.1bar=1volt 0.2bar=2volt) check if those sensors are functialy properly and check the ecu if it gives any codes. after that happy hunting on the rest of the sensors. hope it helps, grtz, Wouter (p.s. im not english so dont mind the typo's)