I think it all depends on the tuner. My mate had his k20 dc2 done by romain and was done within 45minutes, but it always over fueled, romain had sent him a few maps afterwards to try and cure it.Crazylegs said:On the subject of mapping. How long does it take or is it like asking how long a piece of string is? Also how much does a mapping session cost - £500/£600?
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But i went to romain with mine and he was about 2-3 hours, all 3 times i went to him but the car was never right.