:? Hi, does anyone know what this is? There is a quiet steady "thumping" noise coming from it sounds like just below and beyond the steering wheel. You can only hear it when sat in the front seat and the engine is idling and it sounds like a heart beating at a steady rate....I've tried to find it but am at a loss. It seems to be more obvious after hard acceleration but soon settles down to a steady beating again. I have a slight mis fire at the moment and was wondering if there might be some connection either way I would like to know what this sound is as it only started approx one month ago. Does anyone else have this sound? Thanks!!