no boost on my gt4 st205 Options

[pikey]

hi can anyone help me please! went to drive my car back from my army camp and it had been working fine in the morning. obviously i let it warm up before i give it any kind of boost, at least 1/4 up the temp guage. the car was warm and i put my foot down. there was hardly any power with the boost going to 0 wich is vaccum pressuer i believe. theres a strange whining noise aswell.

ive had the turbo off and its all fine, there was however a little oil in the induction pipe but not much. ive checked all the vaccum and boost hoses and they seem fine. in a nutshell im running a motec m4 pro ecu with 1.1bar boost, 3inch exhaust from the turbo with 2.5inch restrictor so its not overboosting and a few other bits but theyv all been on for at least 6 months with no problems.

so all i can think of is maybe the actuator or a sensor or something. can anyone shed any light or give me any contacts please thanks

This post has been edited by pikey: Mar 18, 2009 - 8:09 AM

[pittfirefighter]

yes if you inspected the turbo then check your wastegate... if the pressure went to 0... then the turbo is somewhat working... you never reach 0 vacuum on a N/A car... it wont be vacuum hoses because with that much leak then your car would not stay running... it has to be with the turbo itself or wastegate... might also be a huge exhaust leak before the turbo but you would notice that sound...