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Old 10-05-2008, 03:33 PM
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need help identifying a part

I have an 87 corvette (TPI). The fuel pressure regulator vacuum line runs to a T split and one side runs to some sort of solenoid or sensor and I'm having a hard time figuring out what the part is. It sits just above the A/C compressor and has an electrical connector. I'll try to upload a couple of pics in a few.

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Old 10-05-2008, 04:03 PM
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Re:need help identifying a part, 87 corvette

Checked my manual and all I could find is that they make reference to it as the " ECM electrical connector at the air switching valve"
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Old 10-05-2008, 07:19 PM
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I think you're right. I looked at the vacuum schematic and it appears that the line from the regulator goes to the "air switching valve". But what the hell is an air switching valve and where do I find a replacement? It appears that the o-ring (about 1/4" diameter) has fallen out and its creating a vacuum leak. I've looked everywhere for this o-ring and can't locate one. Funny that this o-ring that I can't find goes to a part that I have no idea what it is, what it does, or where to find another.....
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Old 10-05-2008, 07:20 PM
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Air Switching Valve Operation:
A circular-stemmed device used to control the flow of air/fuel mixture in and the flow of burned gasses out of the engine.
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Old 10-05-2008, 07:48 PM
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I also found this.

The air switching valve directs air to the exhaust ports during cold engine operation or anytime the system is in open loop operation. It directs air to the converter beds during closed loop operations. When divert is needed, the ECM turns off the converter solenoid and causes air to be diverted to the air cleaner or to the atmosphere. Air is directed as such when: Rich Operation
When the ECM senses a problem and sets the check engine light
During deceleration
During high RPM operation when air pressure is greater than seeing of internal relief valve
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