michaellvance
05-21-2012, 09:10 AM
I bought a used 2009 620i , at first it would start and idle fine but any throttle of the gas would cause it to bog down .. I emptied the fuel tank and cleaned it the best I could , replace the small micron filter between the tank and the fuel pump .. It now runs good for 15 minutes or so full throttle but the fuel pump is extremely noisy .. It seems that when the fuel pump heats up it stops working .. any comments would be welcome , is the fuel pump going to have to be replaced or will it work itself out ?