i was driving around yesterday and the car was running fine but then the boost shot up to over a bar it usually peaks at .8 it has an open neck downpipe and blitz nurspec r cat back and a blitz sus induction kit today it happened a few times again the boost even hit 1.5 bar at one stage
anyone any ideas

 

Check that a pipe hasn't become disconnected on the solenoid. Mine did that.

 

all pipes are on and it happens at any time like one minute ts grand then it overboosts like mad