I have a 2003 A4 1.8T FWD with 90K on it. the fuel pump would make terrible whinning noise when the weather got cold (t would stop if it was 70 deg or higher) Went to the dealership,they told me to replace the fuel pump and quoted me $720 to do it. I decided to do it myself so bought an OEM pump. Used the the DIY (It is a great write up BTW) I replaced the pump, put everything as it was. When I put the key in and turned the it on, it makes a whinning noise, like its prepping up and then every time I hit the gas it makes the same noise. I think the noise is due to the priming of the pump. I would appreciate if someone can guide me to fix this. Is the pump bad? Do I need to replace the fuel filter as well to fix the noise?