OK.
1) The tick is probs just the injectors as most rb's are loud as mention before. (you should here my 550cc RX7 injectors,twice as loud as the stockers were)
2) The excess fuel could be just because you are now pushing more air into the motor due to the intercooler upgrade which was also mentions above.
3) If you have a boost leak your car on boost will runn very rich as the ecu will think there is more air going into the motor than there really is.
So your best bet would be to check for leaks 1st then if none are found do an error check on the ecu and see how that goes. Code 55 is all clrear.
Hope this helps.