egr solinoid
Race Director
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Posts: 16,475
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From: Kingman AZ
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
They appear to be different. 1984:
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
1985:
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
1985:
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
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Joined: Oct 2012
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Race Director
Joined: Apr 2002
Posts: 10,036
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From: Anaheim CA
That eBay listing is just the vacuum lines. The solenoid is here:
http://www.ebay.com/itm/1984-Corvette-EGR-Solenoid-Bracket-dellbx-/310729116408?_trksid=p3284.m263&_trkparms=algo%3DSI%26its%3DI%26itu%3DUCI%252BUA%252BFICS%26otn%3D21%26pmod%3D390640129090%26ps%3D54
http://www.ebay.com/itm/1984-Corvette-EGR-Solenoid-Bracket-dellbx-/310729116408?_trksid=p3284.m263&_trkparms=algo%3DSI%26its%3DI%26itu%3DUCI%252BUA%252BFICS%26otn%3D21%26pmod%3D390640129090%26ps%3D54
Last edited by Cliff Harris; Sep 2, 2013 at 02:44 AM.
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Joined: Jan 2013
Posts: 47
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From: Leominster MA
I think the answer may be 'no'.
From all I've read, the 1985-89 solenoid was NO (normally open on the vacuum port). I verified this with my '86, though now I no longer use egr. For 1984 and 1990-up, the solenoid is NC (normally closed on the vacuum port).
That means the ground signal (circuit completion) that activates the solenoid will close the vacuum port if you use the '85, and it will remain open (activating the egr valve) when the signal is missing, or even if you pull the wires off. The '84 will be closed (and the valve will be shut off) until it sees the ground signal for activation. So it sounds to me like you should spring for that '84 solenoid Cliff shows --- and test it first by just holding it in your hand and seeing if you can blow through it. On my '86 solenoid the air passes through. On yours it shouldn't.
From all I've read, the 1985-89 solenoid was NO (normally open on the vacuum port). I verified this with my '86, though now I no longer use egr. For 1984 and 1990-up, the solenoid is NC (normally closed on the vacuum port).
That means the ground signal (circuit completion) that activates the solenoid will close the vacuum port if you use the '85, and it will remain open (activating the egr valve) when the signal is missing, or even if you pull the wires off. The '84 will be closed (and the valve will be shut off) until it sees the ground signal for activation. So it sounds to me like you should spring for that '84 solenoid Cliff shows --- and test it first by just holding it in your hand and seeing if you can blow through it. On my '86 solenoid the air passes through. On yours it shouldn't.
Last edited by leoman; Sep 2, 2013 at 01:52 PM.
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Thread Starter
Burning Brakes
Joined: Feb 2013
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From: norway
I think the answer may be 'no'.
From all I've read, the 1985-89 solenoid was NO (normally open on the vacuum port). I verified this with my '86, though now I no longer use egr. For 1984 and 1990-up, the solenoid is NC (normally closed on the vacuum port).
That means the ground signal (circuit completion) that activates the solenoid will close the vacuum port if you use the '85, and it will remain open (activating the egr valve) when the signal is missing, or even if you pull the wires off. The '84 will be closed (and the valve will be shut off) until it sees the ground signal for activation. So it sounds to me like you should spring for that '84 solenoid Cliff shows --- and test it first by just holding it in your hand and seeing if you can blow through it. On my '86 solenoid the air passes through. On yours it shouldn't.
From all I've read, the 1985-89 solenoid was NO (normally open on the vacuum port). I verified this with my '86, though now I no longer use egr. For 1984 and 1990-up, the solenoid is NC (normally closed on the vacuum port).
That means the ground signal (circuit completion) that activates the solenoid will close the vacuum port if you use the '85, and it will remain open (activating the egr valve) when the signal is missing, or even if you pull the wires off. The '84 will be closed (and the valve will be shut off) until it sees the ground signal for activation. So it sounds to me like you should spring for that '84 solenoid Cliff shows --- and test it first by just holding it in your hand and seeing if you can blow through it. On my '86 solenoid the air passes through. On yours it shouldn't.
Intermediate
Joined: Jan 2013
Posts: 47
Likes: 0
From: Leominster MA
http://tech.corvettecentral.com/2012...egr-diagnosis/