Right any thoughts, had a problem with my boost surging a while back fixed this by putting a new boost solenoid control in, which sorted it.
Now my boost has f****d up again, when i do the 40mph in 4th test it goes to 14psi and holds at 9psi which is spot on, but when i use 2nd and 3rd gear it will over boost like normal the hold then drop to 5 psi at around 3000 revs then works it way back up to 9psi and holds. It never used to drop to 5 psi like it is doing.
I thought it could be a leak but it would not hold perfect in 4th so i cannot see it being that, the only thing i can think of is the AFM but i have no lights up on the dash, but i did not have any lights when the boost solenoid control knackered up.
Any if any one else has had any similar problems with there turbo's and what you did to fix it would be greatly appreciated
Its a 53reg Gsi with 37500 miles on the clock