my weber is playing up a bit, we took the mini to calder the other day and it was running well untill i got into 4th and it just had no power and was backfiring and all that crap.. then today weve taken the jets out to look at them but there wasnt much wrong with them, but now when u rev it in neutral, it goes pop pop pop pop up to 2000 rpm then free revs fine right up to 5500... anyone know what might be wrong.. i know i dont and ive got rob roy on sat/sun this weekend..

ps it doesnt feel like its sucking air into it as u rev... like u put ur hand on the back and it doesnt suck it in.

cheers

sean

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