Hi Simonif u can help me,02 ej20 turbo auto/s/shift,my problem is its not boosting as it should,sumtimes it boosts 0.5 n 0.8 and 1.0 bar,i chead for leaks on intake n vac pipes all gud,checked the maf sensor all gud,checked the waste gate to see if it opening n closing all gud,i took it to the Local dealer for tests,the only thing they could see is that its receving a knock reading of -3 to +13 which they say is retarding the timing when driving with the diag/machine connected so i tride a other knock sensor from my 01 Legacy which looks the same as the foresters one,but its still doing the same,sumtines its boosts as normal just in 1st n sumtimes less,no a lot of help from my dealer,they say it can be a electrical problem,but wont the engine light come on if there is a electrical problem?plz let me know if you can help,o yes when i took the intercooler off i found a bit of oil on the turbo inlet to the y-pipe to the intercooler n found oil in the intercooler,not a lot,is this normal?