VW Passat Startup and Power Problems

Hi Manolo, these symptoms could be related to a number of issues, but a common cause is a faulty Mass Air Flow (MAF) sensor. This sensor measures the amount of air entering the engine and is crucial for proper engine operation. If it's malfunctioning, it could cause the problems you're experiencing. You can try cleaning the MAF sensor with a cleaner specifically designed for this purpose. If the problem persists, the sensor might need to be replaced. Please let us know how it goes and if you have any other questions. Remember, if you're not comfortable doing this yourself, it's always a good idea to have a professional mechanic look at it.