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Old 08-31-2008, 01:58 PM
pimpernell pimpernell is offline
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Join Date: May 2007
Posts: 898
Quote:
Originally Posted by DieselAddict View Post
It's different on my '96. Like I said the 3/6 valve on mine opens as early as approx. 1000 RPM. But I think the X/O behavior is the same as I noticed that one opens much later, but I don't know exactly at what RPM.

Also interesting is my observation that yes, both valves are closed with the engine off, but if you unplug their electrical connections with the engine on, both valves open.
I don't mean to beat a dead horse, but the shop manual for the 96 model reads as follows:

Idle speed to 2550 plus or minus 100rpms...both flaps should be closed.

From 2550 plus or minus 100rpms, to 3350 plus or minus 100rpms, intake resonance flap opens, and intake manifold resonance flap is closed.

Over 3350 plus or minus 100rpms, both intake resonance and intake manifold flaps are both open.
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