[quote name='r0b3r7' date='08 August 2010 - 08:16 PM' timestamp='1281297995' post='91990']
hmm, my folks old 02 plate vectra had a replacement engine fitted (at 60k, cylinder head went) The ecu didnt like the new block, and constantly ran in emergency mode, limiting the speed of the engine, it used to make a simmilar noise when it got 4.5 revs, until it was sorted. Not sure if there's maybe a fault in the ecu. Probably not but thats the only thing i can think of
[/quote] funny you should say that, my dads car has just had a replacement engine fitted (head problem) and now sounds like same fault...what did you do to sort it? Anything I can check/look for? Cheers for that reply...