B16a2 Idle Issue - vacuum at valve cover breather port
07-22-2011, 07:57 PM
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B16a2 Idle Issue - vacuum at valve cover breather port
I've got a b16a2 that's surging at idle -- I did the elementary diagnostics:
Cleaned out IACV, and confirmed that it's working properly.
Checked for vacuum leaks and found none.
I found that there is high vacuum at the valve cover breather port! and when I briefly close it with my thumb the idle normalizes... any idea what could cause this?
Cleaned out IACV, and confirmed that it's working properly.
Checked for vacuum leaks and found none.
I found that there is high vacuum at the valve cover breather port! and when I briefly close it with my thumb the idle normalizes... any idea what could cause this?
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