LHyatt

My battery was replaced in February this year when I got it serviced, so it shouldn't be that. Whenever it rains or if it is humid and misty my engine seems to lose power, it will start but then randomly jerk and jitter under low and high speeds/revs. When I try to correct it by pushing on the accelerator to increase the revs the rev meter will continue to drop and then suddenly increase giving lots of revs for half a second then decrease again making it jittery and hard to drive. ONLY experienced it in bad/wet weather conditions. The battery warning light flickers wildly when the power is decreasing and when the revs shoot back up again it goes off. Any advice is much appreciated.

Hi everyone ! new here trying to find some answers for my little Lupo ! Basically whenever the weathers a bit bad I start my car and the engine ticks slowly and is rather jerky, I have to rev a lot in order to get it moving and when it is moving it drastically reduces in power, continues to jerk and the battery warning light comes on ! Its been for an MOT and been looked over and the garage found nothing wrong, but it continues do this, please help ! earlier on today I was stuck trying to move off from a roundabout because my car decided it didn't want to go over 5mph !!