Boost but no boost...

[CliveH]

We had a problem with the car last week - overboosting big time - going off the boost gauge scale... (stock map)

The culprit was soon found - the N75 valve broken at the T-piece and a split in the silicon intake hose. Swiftly rectified with a new N75 and replacing the original intake hose.

Everything back together and we go out for a test drive, with VAG-COM hooked up. The boost is back to normal, peaking around 15psi, but VAG-COM (group 001) is reading a constant atmospheric pressure.

Any ideas...?

[CliveH]

anyone...?

[Smiley]

Don't know too much, but two things might have happended
1 some little broken part is closing the long small tube on the way to the ecu
2 the sensor in the ecu might be broken with too much pressure (hopefully not)

1 I would suggest to losen the pipe from the ecu and see if the air has a way through...
2 give manually some amount of pressure to a short hose to the ecu..

hth,
Stephan

[Smiley]

Stupid

.. as you read atmospherc pressure, the sensor is def. not gone.

[Greg_S]

Not certain but could be the sensor in the passenger footwell measuring ambient pressure