I've just bought a 2008 1.4 Note for my sister-in-law ( I worked at NMUK building the note I was at nissan for 12 years) 120000 miles in ok condition ( just a cheap car for her to run around in) I've just serviced it as it seems to misfire at 4000rpm like it's hitting the limiter! So new oil all filters new plugs throttle body all cleaned also. But the same problem persists. No lights on the dash and no fault code showing ( cheap reader) any ideas on what the problem could be. Cheers in advance and it's very strange working on a car that I probably helped build looking all dirty and rust.