Exhaust vacuum valve for EGR
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Junior Member
Joined: Jan 2000
Posts: 46
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From: Indianapolis,IN
Exhaust vacuum valve for EGR
This isn't on my bird but my 86 chevy truck. On the passenger side there is a valve on the outlet of the exhaust manifold operated by vacuum. I believe it is related to the EGR system. My question is, does the actuator pull the valve closed with high vacuum or does high vacuum open it? I'm thinking that at WOT you would want it open, not restricting the flow plus you wouldn't have the vacuum to pull it open therefore it should be open at low vacuum.
What I'm getting at is if there isn't a vacuum line to operate the valve it should be open all the time.
Am I right?
I hope someone can help me out here,
Thanks,,, Matt
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Dirt Late Model racer and Third gen lover.
91 V-6 bird with 406 in process.
What I'm getting at is if there isn't a vacuum line to operate the valve it should be open all the time.
Am I right?
I hope someone can help me out here,
Thanks,,, Matt
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Dirt Late Model racer and Third gen lover.
91 V-6 bird with 406 in process.
Supreme Member
Joined: Jul 1999
Posts: 1,294
Likes: 1
From: was: Palmdale, Ca
Car: was: 1984 Camaro Z28
Engine: was: L69
Transmission: was: 700-R4
Matt, RB83L69 and myself just responded your question on the "Tech Forum", JFYI. 
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George P. Lara
Z28s Owned:
1984 "L69" A4
1994 LT1 M6
Member: SCCA, SCFB, SC3GFB
Camaro Info: MadMike's
------------------
George P. Lara
Z28s Owned:
1984 "L69" A4
1994 LT1 M6
Member: SCCA, SCFB, SC3GFB
Camaro Info: MadMike's
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