2006 Jetta 5-speed stall
Our car did this after my wife filled it with gasoline at about 88000 miles...of which I could only remove 9.5 gallons without removing the tank. I drained the lines, changed the filter, refilled with diesel and a gallon of diesel fuel conditioner. It was very difficults to start the first few times, and on that tank of fuel the engine would stall if you pushed in the clutch as normal while approaching a stop. However, if I allowed the RPM to drop to idle level before I hit the clutch, the engine would continue to run at idle. Of course, when this tank of fuel was gone and tank was again full of diesel, the engine operated as normal. It seems there is an idle circuit the engine switches to as opposed to the off-idle/normal operation circuit, but I do not know what gadget makes it so if this is the case. I've been studying engines, building engines, and tuning cars for many years, but am not particularly well versed on the TDI. The car has 101000 miles now, just returned home from a 1000 mile trip pulling a trailer that weighed about 1600 pounds, the car got 35 MPG at 70 mph on the highway mixed with about 30 miles of in-town driving.