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hi brian,
thanks for the comiserations...
i didnt make a lot more progress on the cat for 2 reasons...1 - lack of information, 2 - cant get the bloody thing off!
i did a series of high rev WOT tests to read back preusre off various points on the system and came back with a maximum peak of 5psi pre cat and 2.5 psi post cat...
THe problem is no one seems to know what it SHOULD BE...but for subaru impretsa turbo's i understand 16psi is not abnormal so i doubt that 5 psi is the issue...but like I say without figure who the hell knows!
this oil thought is pretty much my last throw of the dice ...I just cant defend pooring any more time or money into this...no one seems to be able to offer any SOUND diagnostics..people just hear half the story...the nmber of people who say 'turbo's gone' when it uses exactly the same oil on the old turbo and the NEW turbo is unbelievable....(as say piston rings when the compression test is fine....)
It really is a shame but I think it has just got to the point where I hate the damn thing....
I tought about trading it against another brick, but honestly I just cant face this level of grief again..so its either take it to the dealer..and spend yet MORE money...of just trade it a gainst soemthing like a toyota or honda which at least wont burn oil...and demand my every spare hour is spent on them
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