Have fitted boost gauges before no probs. I have a 05 wrx300 with ppp, fiited gauge, and all I get is a vibrating needle, wont show boost until answer? I lift off, then quick movement to reading down to zero. Driving me nuts, any one got an answer?Thanks

 

Some boost gauges have a restrictor to fit as well. You havn't said what make ?
GReddy have a tech page which gives you all info for fitting etc your's might have a page as well !

 

Thanks for answering, but have tried 2 different gauges, and as I said have fitted exactly the same way before, I have feeling something to do with the ppp, means I have to use a different pipe,its driving me nuts, even change the pipe to ther guage incase its dodgy!Perhaps best just shoot me!