[COcyclist]

I followed the original Throttle Stop thread and assumed it would not work on the TDI since it is both drive-by-wire and turbocharged. I saw this thread and hoped it might give us another option besides A-B-A that Darrin has suggested for years. Alas, I tried it today without success.

I had the car mostly warmed up on a flat, straight road, at 70 mph, 16 degrees F with zero wind and speed and elevation measured by a Garmin on the dash. First, the Throttle Position Sensor on the ScanGuage (TPS) was useless as it just read 95 all the time unless I really stood on the throttle. I tried Load (LOD) but it was all over the place even with my right foot braced tightly on the footwell. I finally tried Gallons Per Hour (GPH) and was able to hold a fairly steady 1.66 @ 70 mph. However the windows up or down did not show a consistent difference in top speed.

I would say that for the most common small diesels in North America (Volkswagen Audi Group TDI) Throttle Stop testing may not be a viable option.

If anyone would like more info about A-B-A testing on my Golf TDI check out my Heresy thread.

EDIT: I just read a note from Julian that suggested that the test distance needed to be over the course of a kilometer. I may have to repeat the test under better conditions in the future. If anyone is attempting this with the TDI I still suggest bracing your right foot and using GPH on the ScanGuage