Yesterday my GTI started randomly stalling when I was driving at a sustained speed (35mph). It would give no warning and just shut off. It would drive and idle perfect until that happens. Most of the time it would take a couple minutes to be able to start back up and sometimes it would start right away. Once it does it one time, it continues to stall every block or so, but it runs perfect in between. Sometimes it stalls for just a second when it's still in gear driving and will pick back up.<p>When I am cranking it over trying to restart it, I don't hear the fuel pump kick on. I can hear relays going under the dash but normally I can hear the whine of the pump. Recently the pump has gotten louder and sometimes the whine from it raises with the rpm's of the engine. I'm not sure if the fluctuating of the volume from it is normal with these engines.<p>The situation with the fuel pump whine is making me lean towards thinking it's a fuel pump issue but is there anything else that I should check out first before forking out the money for a new pump. I'm normally good at diagnosing electrical issues but being my first VW, I'm not sure where to start.