Bought a genuine MAF, still the same, took it to REVO dealer this morning just pixed it up all Fixed!!!!! Had got itself stuck in Valet mode they managed to get it back into Revo mode and its perfect, maybe with the new MAF i dunno but feels faster than it did before :) thanks for everyones support and help on this!
 
Good news Brad ! I'm pleased you've got it sorted.

So do you think the other guy plugging his computer into your car made it go into valet mode?

Who knows, but all he tried to do was read the file and didnt try any writing so cant blame him at all as he was doing me a favour, obviously if that is the case then Revo's software is encrypted and didnt like the fact someone was trying to tap in, in fact the Revo dealer i went to said it was file protected? Main thing is its fixed and didnt cost the earth!