SINKYBOYUK.
i spoke to my mate today and told him your problem, he wants to know what chip it is as he says hearts,spades and # is the ecu type and doesnt
tell you what chip has actually been fitted inside, he says that alot of chips available have the boost limit set at 15 psi so that may be the case with yours.get back to me if you can,ive been a mechanic for 7 years and ive been working on my rs for about 5 years but my mate really knows his stuff, ile try and get him to sign up lol.