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Hi can any one help, A200, I have just done an engine swap, the new engine was from a GLA auto which has 11000 miles on it, now sits in my A200 64 plate manual. When I rev the engine there is a hiss basically like a snake, I’m in the uk and there are no snakes here. I have done the propane test for vacuum leaks and no reaction, ie idle jumps etc. The hiss sounds like it’s below the AC pump ( may I add not been re gassed as yet) That said ac will not try to run so the electric clutch does not try to drive the pump. Please can any one shed a light on this for me.
 
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