GREGGYG

iTrader: (2)

I was sent this part by the supplying independent dealer where I bought my JDM STi 03, due to a low boost problem...........turbo is boosting at only 0.7 bar and should be 1.2 bar, standard. A Subaru main dealer diagnosed the low boost, tested all the relevent sensors, and whatever else they check, and their conclusion was that the fault 'points to the turbo', they didn't DEFINITELY say yes it is the turbo. Anyway, the supplying dealer stated that it's very rare for a turbo to fail so easily, and wanted to send me this part to try first and see if it cured the fault, but it hasn't, to my disappointment!

The car is under warranty, and I've now insisted that they, the dealer, either come and pick the car up and bring it back to me rectified, or they arrange for me to take it somewhere locally where the fault can be accurately diagnosed and rectified, as I'm sick and tired of this! I asked the dealer to call me within the next couple of hours with a response.

Any further suggestions/advice would be most welcome! Thanks!

Powerstation

Greg:

Definitely sounds like the turbo to me, give us a phone as between us and iain we have a number of these turbo's in stock.

Regards

Rich

terzo204

Looks like you are really fire fighting today Rich!

LitchfieldImports

Car didn't come from me but it would be no problem to have a look as Rich suggests.

Iain

alcazar

iTrader: (2)

Update? Did the stealer ring back?

My money's on "no".

Alcazar

GREGGYG

iTrader: (2)

The dealers has never called me back, always me chasing them...........but I'm no pushover, I told them how slack I thought they were.

Update is this: I told the dealer I had fitted the boost control solenoid they sent me, and the car was no different in performance. They asked me to reset the ECU by disconnecting the battery for over 30 minutes, then reconnecting it and driving the car for around 10 miles. I will be doing that drive tonight aroung 8.30pm, then posting back on here soon after that.

I made the dealer agree, (the car is under warranty, dealer warranty), that if there was no significant improvement in performance after the 10 mile drive tonight, then they have to arrange for the car to be collected and rectified asap, as I want it fixed and running to its correct performance, which is 1.2 bar of boost, not the current 0.7, nearly 50% down on power.

I'm now sure it is the turbo after speaking to Powerstation, (who originally diagnosed the fault, but the supplying dealer wanted a Subaru main dealer to examine the car, and they almost said the same diagnosis!). I'll try to persuade the supplying dealer to let Powerstation do the work on the car, which I don't think they will. They were talking about collecting the car and taking it to their garage in Scotland! Surely it will cost more to transport the car from London to Dunblane, Scotland, which is where I bought the car from. It was all so good when I bought it, all documentation/history, Jap auction cert grade 5A car, and in 10 weeks of ownership ive had to replace the speed sensor, speed converter, and now the turbo. Very strange.

ZEN Performance

Or pop into an independant specialist who may be able to diagnose the problem with a little more accuracy.

It sounds to me like the boost control pipe may have been tampered with and the restrictor removed deliberately or accidentally. Alternatively the car could be suffering from a poor aftermarket remap, or just poor fuel on the standard map.

A new restrictor costs a hell of a lot less than a new turbo. Of course it could be the turbo, but I doubt it.

Paul

Scott.T

iTrader: (2)

He's already checked the restrictor Paul, via the other thread.
It is a bit or a stange one...I'm not sure if it's the same on the newer cars but it isn't a case that the diagnostic connectors under the dash have been left connected is it ?? As I do know this has happened on classics in the passed. If this is the case you will only see about 0.7bar.

Are the hoses to the solenoid correct. It should be turbo outlet to t-piece (with restrictor in this pipe). Then t-piece to actuator.
Then bottom of t-piece to top of solenoid. bottom of solenoid back to inlet manifold, via a 90 degree elbow.

Mocom Racing

iTrader: (2)

As Paul has said, I doubt it's the turbo and it's worth datalogging the ECU for a more accurate diagnosis.

Dependant on where in London you are based we may not be too far, just 5 minutes from Juntion 27 of the M25.

ZEN Performance

As Zak says, if you datalog and the car is providing adequate boost solenoid duty then check the mechanical stuff. But it seems coincedental that the turbo should be boosting happily at wastegate pressure.

Although I would add, if it turns out to be the turbo, Powerstation do have a good supply that I am sure will be at competitive prices.

Paul

GREGGYG

iTrader: (2)

I really appreciate all your help everyone, and I'm now in the process of arranging with the supplying dealer that they collect the car, they diagnose and repair it, and return it to me fully functional. I'll let you know what happens.