I'm trying to understand why it's so intermittent and if it is only turbo that would cause this? Could map,maf ect be at fault? on March 13, 2014, 12:07 am, in reply to "Re: focus intermittent black smoke and loss of power."
Are you trying to say I'm on the wrong track?
Can over pressurising on fuel cause smoke or would you expect it to knock instead.