I have bought a possum link for my 1990 Rs legacy and have come across a problem with it, I have a hand controller and the link seems to have a base tune on it with the master fuel set at 89% which seems right from what I read on here, however at 89% master fuel my car overfuels really bad and wont even start, I have to have the master fuel down at around 40% for it to start and idle nicely, the only mod I have that may be affecting this is sti 440cc injectors, any ideas on whats going on? car runs fine with factory computer chipped for the 440's