Hey guys,
So as title states, I get this vibration under load in my sti which im having trouble diagnosing. It's mainly when i hit full boost. It's kind of hard to explain but i will try my best.
When i accelerate hard i feel this vibration through the steering and sort of a grinding noise comes along with it. It only happens under full boost. It doesn't happen if im half throttle or just cruising around. It's quite a nasty vibration, not enough that the whole car shakes but definitely enough to give you the "WTF is that" feeling. I purchased the car with this problem and originally thought it was just the power steering as that was shocking when i first purchased. I flushed the system, put a new o-ring in it and bled the system. Power steering is now fine but vibration is still there.
The guy i purchased it off took it into a garage and they came back and said it may be the turbo bearings or the internal gate nor opening fully (car has done high kms). I'm doubting that, as there is no whine or smoke and the turbo pulls rather well. I've had the car up on the hoist and everything looks normal. No play in anything except a L/F wheel bearing which i will be replacing next week. May even do the engine mounts as well. The C.V's look good and so does the steering rack. I had a look at the universal joints as well but they seem to be fine. It does have a 6puk clutch but i didn't think that would cause it shudder under load?
Anybody had a similar thing happen to their car? Looking for some ideas/opinions before i go spending hundreds of dollars on parts that won't solve the problem??
If anybody is confident they can accurately diagnose the problem, i'm more than happy to make a trip out to you with a box of your preferred beers so you can test drive
Any help will be appreciated as i would like to sort it out before it gets any worse or cause any real damage.
TIA