Hi guys I've got a problem with my autograss race car I've got a saxo vtr engine in pug 106 when I start it up its fine leave it at idle its fine as soon as I rev it its making a very loud clunking noise as soon as carb is half way open it don't do it then it will idle as normal butt keeps doin it as soon as I rev it any help would be great thanks
saxo vtr engine cluncking
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