Originally Posted by
Guinnless
Have you replaced the dump valve recently?
Check the wastegate isn't stuck shut by disconnecting the actuator
from the wastegate arm and make sure it moves freely.
It is possible that the amal valve is faulty. To check it simply conect the
pipe from the compressor housing direct to the wastegate actuator.
If it still overboosts then you may have an actuator/wastegate fault
Thanks for the advice Guinnless, I will attempt to bypass the Amal for testing. I bought a new actuator recently thinking it was that, and it made no difference. I will let you know results. Again really appreciate you responding to my thread
