Quote:
Originally Posted by 86fun
What symptoms do you see when it fails?
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Depends on how big the hole is in the diaphragm. This one just started so it's basically a small vacuum leak, the valve still operates but is leaking vacuum so the car stalls occasionally but I haven't logged anything yet. The original one developed a couple holes, one fairly large so I was seeing high fuel trims in the logs and smelling fuel due to it running super rich.
It's easy enough to test, just pinch off the vacuum supply hose going down to the bypass valve and if nothing changes, i.e. idle stays the same, no sound difference, the valve stays opened...then it's good, no leaks.