hey guys got a problem with my car idles fine starts fine runs about 2 to 4 psi of boost but after that it sounds likethere is a major boost leak like its not going into the motor but it idles fine and runs good checked all hoses joiners boost gauge brake diaphragm checked any thing obvious it sounds like the turbo's boosting but not entering engine its different no idea what it is its nearly like my inlet manifold is leaking but it idles fine got no idea hope one of you have thanks

you need to test test the system for leaks. the easiest way is to make (or get someone to make) a short bit of pipe the same size as the turbo inlet with a capped end and a fitting so you can hook it up to an air compressor,pump it full of compressed air and the leaks will be obvious. i do it all the time to test for leaks and it works a treat.