| 1) NO. As I mentioned in the writeup, the exhaust manifold is under considerably more pressure than the intake manifold. I know this because I have put a pressure gauge on the exhaust manifold to confirm what I have heard everywhere else. I was seeing as high as 50psi in my exhaust manifold with an older BB set of turbochargers when running about 22psi of boost. Because of this, the exhaust blows into the intake, not the intake blows out the exhaust. 2) You dont seem to understand what I put in the writeup. A stuck open EGR when the plenum is under idle will cause the plenum to suck exhaust gases from the manifold and recirculate it through the engine. This will lower MAS readings and cause the engine to run poorly, dependent on how much of a bleed there is. To test this, hook the EGR directly to any vacuum port on the manifold and watch to see how poorly the engine idles and runs while cruising. The volume of exhaust gas that is allowed into the intake is variable dependent on throttle position. When you first crack the throttle open, there is a good bit of vacuum pulling the EGR open. As you open the throttle even more, there is less vacuum felt at the throttlebody chamber port and the EGR begins to close. As for the inspections thing, again, I dont think you read all of my post. I specifically mentioned about the visual inspection.
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[ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
Albert Einstein
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