Quote:
Originally Posted by t vago
I would have to share razor02097's concern about your cooled EGR pipe actually sucking in oxygen from the end of the tailpipe. And is your idle air intake always "seeing" intake manifold vacuum, or does it only "see" intake manifold vacuum when you're not using the accelerator?
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In practice it probably does suck some oxygen in because of small leaks in my exhaust pipe.
Intake definetly is seeing the vacuum. I could have connected the egr pipe to some other point in the intake manifold, but since this is a fuel injected engine and intake manifold is designed according to that, some resonant pipes, I need to consider the even distribution to all cylinders. Idle air intake have small holes leading to all cylinders intake, so it should mix the air and exhaust gas more evenly across the cylinders. When there is uneven distribution of EGR between cylinders, the air/fuel ratio is also uneven.
I try to post some pictures of mu setup tomorrow.