What sort of AFM (assuming they are AFM) do the GT4's use? The vane/flap type or the hot wire type??
Let me know before I blurt out something that may be completely wrong.
No body answered but I will throw an idea out there as it may help someone one day.
The exact same problem you are describing is very common in WRX's that are a few years old. The problem is a dirty AFM (a gunk that builds up), a very careful clean (after removal of the AFM) gets them running smooth as silk again. This may or may not be applicable to GT4's, I really don't know? But it's just an idea that solves a problem in other vehicles, only you guys would know if it's relevant or not.
Surely the GT4's didn't do this shuddering when they were new?? People would have been back to Toyota complaining. They are quite a refined vehicle so even though it is obviously a common occurence to have the shuddering I am pretty sure it wouldn't be normal.
Quote:
the reduced boost while cold, and it's relation back to the computer
Lower boost should not cause any such problem, it makes no sense. The ECU is well and truly advanced enough to sense the lower boost level and supply the appropriate amount of fuel at lower boost and low operating temps (lets not confuse a doughy lack of power with the shuddering first asked about in this thread though).
Thu, 05 May 2005 03:06
but I will throw an idea out there as it may help someone one day.
