mate i wish i never wasted a penny on any of my cars!id have a new vw scirroco and money in the bank if i hadnt! its all dead money and you goin to get very very little of it back... out were he is hes not going to get much use of it anyway! put the money in the bank in a few years time your thank me!
just out of interest how old are you fella?
but if you really have to spend some money id say get it mapped and leave it alone! we all know they only start going wrong when you mess about with them too much!