Some lucky customer came in to our place for engine power loss problem solving .we need to remove injectors ,so we took out inlet manifold and found this :surprised: IMG_1130.JPG one flap was missing ,complete one ,but engine was running perfect on idle .So took a chance and used my video scope camera ,and look what she showed us , complete flap stuck in the head port just before inlet valve ,not much left and it would get into the cylinder :wink:,so after some play with few other tools we got it out one more happy customer .