MY99 UK classic hais suffering with boost cut it will get to 0.5 bar but wont go higher it just flat lines there sometimes it will spike but most of the time it just cuts boost until i ease off the throttle.

Any suggestions would be great Thanks Anthony

 

Sounds like its in limp mode and limiting the boost due to problem someware. have you tried connecting the green and black plugs together under the steering column to get a fault code if there is one?

 

i have connected the blacks together to flash the code it came up with 32 = AF1, AF2 or Oxygen sensor and 85 = high voltage on the charging system im not sure what the AF sensors are though and im guessing the oxygen sensor is the lambda sensor

 

i have just done a reset on the ecu and still have the same problem

 

Yeah, Lambda has failed. AF=Air/Fuel=Lambda.

I would think that the ECU is pulling the boost due to incorrect fueling input caused by the Lambda sensors failing.
Now where did you get 85 from?? As it is a new one on me.
I can only thing it is related to the Lambda, perhaps a short from the 12v heater on the Lambda.

 

Legend

85 is what flashed up on the dash and thats what it relates to on a manual