The dreaded MK3 limp mode in 5th gear

[chewy8000]

Thats tempting but too far away.

[jlinfert]

You might check the VWVortex Carbs,ITBs and SEM forum I believe there are a couple of Megasquirt installer/tuners in your area. Several of them are very very sharp.

[Flyinglizard]

You can monitor the OBD 2 setup with an Actron reader. It wil give the freeze frame that set off the limp mode. (Verify the VSS problem.)
This reader also shows the active data, as the car runs. I keep a list of known good values for thse cars. Why??..
Along those lines, there may be a % speed reducer to fit inline with the VSS. Modify the speed imput,etc..
Maybe swap drive gears.
PS I think that the VSS is a hall gen. Take off every other lobe and see if that changes the deal.
MM

[Beran]

Which Actron reader do you use? Do you keep it plugged in all the time?

[Flyinglizard]

Yes, you can plug it and run with it, observing (most of)the data. VW has a lot of VW only codes and they may not come up. But the code # often does and the book can decode the # for you.
The Actron model is the second from the bottom, price wise. They have come down to about 100$ at Autozone. AZ may use one to check and reset codes at the store. Check your local store first and ask to try one.
MM

[Flyinglizard]

What was the final result of this?? Did you get it go go over 112 mph?? TIA, MM

[chewy8000]

Yep we had the issue fixed with a chip from the guys at Techtonics. They just re-programmed a chip and deleted the top speed limiter. No issues now car runs great! 3rd place in the first debut of the new car.