2000 gtb auto not boostimg primary over 5 psi and then hits secondary

[Prodrivebugeye]

My mrs dropped her 2000 gtb auto into a mechanic one day before work, A1 automotive in fitzgearld ave in christchurch to get her steering rack boot replaced and a wof. They took much longer to deliver the car back than they\'d promised, told her they had replaced the passenger side park light but was still left unplugged from when I had last put the light back in, told her they had \'degreased\' the entire underbody of her car and tried charging for the extras never permitted and now the majority of fhe time boost is jerky and only gets 5psi before the car transitions to secondary. Starts and idles ok but the boost gauge reads only -10 at idle, used to be ~-20

Only error code i found was an old oxy sensor code that hasnt come back after an ecu reset

Any ideas? Vacc leak maybe?

[Jord]

Yup sounds like it.

Check all the hoses for leaks, some get pretty brittle over time and can break if tampered with.