Quote:
Originally Posted by Ultramaroon
Does it? o.0
The vacuum to which you're referring is downstream of the valve. It has to open up against that - like lifting your hand off of a shop vac hose.
Or am I missing something? Honest question.
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We know the motor uses reversion at certain rpm ranges, to substitute for the lack of egr valve. That's pulling exhaust back into the cylinder. The exhaust valve opens before bottom dead centre. That's vacuum in the cylinder.