jolting/starving

  1. #1
    ok steve off here has been proper helpful with issue,but wanna check, car will start fine run fine most times but last month or so has been driving along and studdenly jolts and judders untill i take foot off accelerator then it stops for a while.
    now steve has said fuel pump, which is still in post and went in garage yest for service so plugs and fuel filter been replaced. and ran ever so slightly better, so question is if its not fuel pump, whats left to check? map sensor was replaced bout year n half a go????

    and secondly once new fuel pump is in will it stop the problem totally or will it take a while to work through???