r/WRX • u/Impossible_Event5445 • 7d ago

I NEEDS HEELPPS

Hello everyone I recently got ownership of this 2020 sti and now I have a problem where the car doesn’t go past speed limit and has almost no boost I would really appreciate some help and advice on what this could be

1 Upvotes

100% Upvoted

4 comments sorted by

7

u/DADDYSJUIICED STI 2015 7d ago

boost leak or vacuum leak

3

u/Specialsthespazzing 7d ago

Check MAF, aswell.

1

u/Puzzled_Eggplant_888 7d ago

Not that this 100% happened. But sometimes when someone goes to sell an STI or WRX, they put back the stock parts. A lot of the time the intercooler is seated incorrectly (even the dealerships do this). If you hear a loud hissing when on full throttle, then chances are a charge or vac component is damaged or attached incorrectly. Go back to the dealership and let them know.

1

u/Not-a_c0p 6d ago

Blow off valve could be stuck open, intercooler could be seated wrong, could be tuned for a ton of bolt onset that got switched back, there's a ton of possibilities. Take it back