since refitting....properly, the overboost hasn't got much better, although once it has initially overboosted, it will drop back down and prrrretty much stay where it should. this is after cleaning it with some wd-40. have i just not cleaned it good enough or summit? i also find the car hesitates a wee bit after starting up, warm or cold. almost like boost is being held back for a breif second. what i'm asking is, can you not clean the solenoid good enough, or am i possibly looking elsewhere for a problem?