hi guys when im driving my astra vxr and i put my foot down i sometimes get a flat spot. feels as if the traction control is kicking in but its not. what could this be. the car runs fine when im driving normal but when its ticking over the rev counter needle slightly moves up and down. i have recently put a stage one map on from regal and its give it more power and now i find that flat spot more noticeable. just to say tho it doesnt allways do it. and sometimes i can get around it by slowley accerating inside of just planting my foot. if anybody can help id be great full as ive only had the car a week.

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