Hi my golf is struggling to start takes 3-4 times then chugs alittle with a little white smoke from rear but then runs fine Recently had the head re done skimed and refitted due to over heating Plus new water, full cam belt kit, oil & oil filter change, new glow plugs, air filter I got advised about the injector loom looking dry and brittle but didnt have time to get hol,d of a new one Could this loom be the problem? I also put a bottle of redex in tank with 40 diesel ? Any advise please thanks