Someone once said that a good technician is not expensive but, rather, priceless. Having said that, I note we have all spent way too much time on an intermittent problem to justify the hours spent on these types of problems.
Understanding Induction Systems on Naturally Aspirated & Turbo-Equipped Engines
You have heard it said before that the internal combustion engine is basically an air pump. The internal combustion engine has never been 100% efficient, but recent technology has improved the engine on a major basis with the addition of intake runner control systems, variable valve timing systems and turbo and turbo-equipped engines.