i have just a standard boot usually of 0.7 kg/cm2 and when no pressure about 45 cm/hg
driving today it has changed and boost has droped when vehicle is not running guage reads 0 when idling it now read 10 cm/hg on guage and when under heavy acceleration i now only have 0.3 kg/cm2 can anyone tell me what the problem can be is it possible the diaphragm in the actuator has gone if so where can i get one from or is it the turbo
i have no boost controllers on car only a turbo timer hks and baileys dump valve

 

Have you checked all the hoses are good around the turbo, intercooler, dump valve and inlet manifold ?

Thanks

Gavin

 

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