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...

[pikey]

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...

ive got an aussie down pipe and front pipe both with the heat coating and a full blitz nur spec system. theyv had the down pipe off but it looked ok and thats where my custom restrictor is 2 that theyv put on another gt4 thats fine so i can mayb rule that out. so ill tell them to have a look at the wastegate and actuator

thanks for all the help so far guys keep it coming lol im drivin my grandads rover 75 atm and its really not the same!

what dump pipe you using?

some have been known to jam the wastegate open, which gives the same result.

by the way how many versions of your car wer made, what extras do they have and why were they made?