Chipmk2st Posted May 19, 2019 Share Posted May 19, 2019 Hi im looking for some advise on my mk2 ST I’ve just spent a small fortune on getting it upto scratch but something else has just come up.. Ok so when I go to accelerate hard the Turbo Gauge usually sits at 3/4. But today it shot up into the red but it didn’t feel the boost it usually does. So gauge is max but power is low.. I have tried to search for answers and the main answer I could find was either a split pipe or Solenoid? Any ideas? 🙂 Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted May 19, 2019 Share Posted May 19, 2019 Could it be a problem with the turbo body itself?A hairline crack or a blowing gasket could be the cause.Sent from my SM-G965F (S9+) Quote Link to comment Share on other sites More sharing options...
Chipmk2st Posted May 19, 2019 Author Share Posted May 19, 2019 Thankyou I’m getting it in this week so I’ll put that idea forward 🙂 Quote Link to comment Share on other sites More sharing options...
Dan P Posted May 19, 2019 Share Posted May 19, 2019 The boost solenoid is a common component to fail on the ST225. My wife’s ST had similar symptoms to what you’re reporting and it was owing to the boost solenoid. If you have a look on YouTube there are a few videos showing the kind of behaviour you might see, although for us it was intermittent and fairly erratic! I had a go at replacing it myself but it was far too fiddly for me. Quote Link to comment Share on other sites More sharing options...
James91 Posted May 19, 2019 Share Posted May 19, 2019 My old st225 used to do something very similar. I found out the engine sound symposer had split on the rubber diaphragm. It gave me a reasonable boost leak. I ended up removing mine and blocking it off Quote Link to comment Share on other sites More sharing options...
Chipmk2st Posted May 20, 2019 Author Share Posted May 20, 2019 Thankyou I love my ST and trying to keep it going 🙂 3 Quote Link to comment Share on other sites More sharing options...
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