My friend has a 98.5 A4, which is currently stuck at UB because the throttle body is stuck partially open.
Anybody have any input as to how to temporarily fix it so he can at least drive it? I personally know nothing at all about those cars, so I cant even tell him where the throttle body is.
I dont even know. If I could look at it, I’m sure I could fix it, but alas, I can’t be everywhere at once.
The way he described it: the gas pedal will go all the way down, but halfway back up, it stops. He is going to look at it tommorow, I thought perhaps someone here could tell him what to look for.
I told him to just look at the mechanism, see if there is anything obviously wrong with it, and try lubing the mechanism and working it a little…
I’m probably going to end up seeing this car today. I spoke with Eric yesterday afternoon. If it weren’t for the placement of the throttle body, it would be an easy parking lot job, however, these are kind of a pain in the ass.
Nasty ice/corrosion on the mechanism? Broken return spring. Binding throttle cable. Floormat under the pedal.
On B3’s one common reason for this is sagging hood insulation. Messes people up. While driving it behaves badly. In the garage while diagnosing and the hood open it runs fine.
I would have to lean towards something physically freezing. I was driving the beater 4kq and the left rear strut is actually frozen, making for a rather harsh/odd ride.
ive had issues with the throttle freezing shut on other cars… it seems to be the area where air pockets seem to form inside the throttle body coolant passage… since its kind of restricted in there.
yea… most cars run coolant through the bottom of the throttle body to prevent it from freezing if there is moisture in the air (think about it… lots of air running into a cold TB COULD create ice before the engine is warm) so coolant is run through the TB… my tiburon did it. ive seen otehrs do it as well. but air pockets tend to get trapped there if u have bubbles