Hmm, seems like someone had the issue before and a bodge was carried to rectify the issue (or at least attempt to rectify it). There is an issue with the timing chains and as far as I can see it was a recall from Nissan. It does suggest that it occurs on hard acceleration (e.g. from a slip-road) and if the chain is slack it can drift away from the timing point by a small fraction (much like a loose timing belt) which can then throw a code for cam/crank timing and result in what you are experiencing. I would personally replace the engine oil and look to see what has come out - e.g. metal particles and then replace it with the specified oil which may have not been supplied with previously. https://www.autodoc.co.uk/car-parts/engine-oil-12094/nissan/pulsar/pulsar-hatchback-c13/107484-1-2-dig-t If you use a quality oil of the correct specifications (as listed in the link above) and see if that makes any difference to how it runs. If no real difference is noted then I would advise to get the timing chain replaced which will almost certainly make a difference if it is worn