Polo Gti 1.8t 20v overboosting

[louis7]

Hay. I would like to ask if anybody could help me. I've got a 2007 Polo Gti and I have it for about 3 months now. 3 Weeks ago it started to overboost it was easily noticeable. When i was stepping on the pedal it went crazy and was definitely overboosting. It wasnt driving evenly so I read some forums and they said to replace the N75 valve, so I did. Its boosting evenly now but still overboosting. I then replaced the MAP sensor as well, and no difference. Car is boosting like crazy. What could the problem be ? Is it possibly the wastegate getting stuck? Please help!
I dont want to take a risk of blowing the turbo or engine.
(btw had it on a OBD2 bluetooth app on the phone and it was boosting about 24 psi or round 1.7 bar. No error codes came up though)

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[andrew_wright]

Sounds remapped to me. What do you know about the car?

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[Crasher]

Yes, sounds like a "man in a van" remap, it needs flashing to standard first to make sure everything is OK and then a decent remap. My wife has the same car and I remapped it with the APR stage 1, it's very refined and controllable, the car that is, not the wife...:chairshot