Hi every body I'd a realy bizarre problem. My engine start and turn realy high but just burn the gas we put in carb. and stop. carb are working well so after two weekend I finaly found the problem. There was a little gap between the EGR valve and EGR spacer so breath his air by there and don't even take gas from carb. Maybe obvious for some of you but I was very proud of me to find it my self :bananaman that's it form my piece of live and it will maybe help someone someday David