I have a problem with my cupra 280 with IS38 turbo and stage 1 ecu, every time I press the accelerator to reach the maximum speed, around 160-200 kmh I get an EPC light and fault p0234 overboost from diagnosis
The lower the gear, the sooner it goes into overboost exceded, for example in 4th gear at 150kmh, in 5th gear at 200kmh
Checking through OBEleven I read a pressure of 1.8 - 1.9 bar (26-27 psi)
It seems to me too much for the IS38 turbo, is it possible that the tuner has made a mistake or some sensor (map?) that doesn't work properly or the wastegate that doesn't open enough?
The lower the gear, the sooner it goes into overboost exceded, for example in 4th gear at 150kmh, in 5th gear at 200kmh
Checking through OBEleven I read a pressure of 1.8 - 1.9 bar (26-27 psi)
It seems to me too much for the IS38 turbo, is it possible that the tuner has made a mistake or some sensor (map?) that doesn't work properly or the wastegate that doesn't open enough?
