When my ECU blew the dealer fitted the original standard one for me to get me going. They adjusted the CO but warned the fuelling would not be right. The following week I had the PC3 fitted and on Dyno it was obvious that the fuelling was dangerously lean at the upper end. They were quite concerned that I might have been thrashing it on track like that, which I hadn't. I don't beleive that it is tweakable, or why would they produce an exchange ECU?
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