Focus st225 no boost

Focus st225 no boost

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Discussion

Skyway20

Original Poster:

2 posts

42 months

Tuesday 25th May 2021
quotequote all
Hey I have a 2007 focus st.

I’ve having boost issues along with a jet sound almost on spool up and dump valve sound randomly or when letting of throttle I have no dump valve lol.

There are no leaks that I can see replaced all the claps etc change re-cerc valve for turbosmart and the boost solenoid, vac pipes for silicone one.

Car feels quite sluggish almost like a non turbo car and every now and then come to life for a second then go back to holding back. Followed by the sound of air releasing.

Would the MAF have anything to do with this.

Any ideas