I was driving other day when I got a traction light and flashing epc light on my cluster. Things went downhill quickly from there. Throttle body took a few attempts with vag-com to finally align. Idles were up and down and erratic shortly after.
Took the TB off an noticed that the flapper was sticking (but the TB was clean). After I drove around a bit more, the TB mostly gave up on life. I removed the TB from the car and inspected. What I found was that the bearing on the electrical side of the TB was starting to rust up, causing quite a bit of drag on the flapper. The o-ring right before the bearing was shot. I noticed the other bearing was just fine, and it didn't even seem to have an o-ring to keep moisture out.
Car has 77k miles on it, and I've only had W/M for this summer. I feel like the damage to that o-ring and the bearing damage couldn't have happened in that short of a period of time, but I am sure the w/m only helped to accelerate the deterioration of those parts.
I am running 100cc's after the intercooler and another 100cc's after the TB. It's not like I am spraying a ton in there, and I don't start spraying until you really punch on the throttle.. it hardly comes on at all when driving around town.
Has anyone experienced this same type of failure with m/w? Is there anything that I could do so this doesn’t happen again? Maybe it was just a fluke, but I am guess it had a lot to do with W/M.