Hello abit of sputtering need some advice please

Hello right my car is sputtering wen starting up.. What happens is I start the car up it's all good no problems ... Then pull out of drive and it's ok .. Then it starts to sputter bad and really rough idling turn the ignition off then start the car back up and it's fine no problem for the rest of the day.. I fink I noticed it plays up wen it's been raining or damp ... I've replaced the plugs and fuel filter and air filter ... Has anyone else experienced this problem and know what the cure is ? Thanks for ur time to reply





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