EGR Bleed Solenoid
June 18th, 2015, 6:26 AM
#12
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Lol... no not yet, i know the dash so well, it would only take 30 minutes to put them in.
I picked up my vacuum switch last night. Funny how the switch was 20$ but the pigtail was $30.
When i rebuilt the motor i changed out the condensor and heater core since everything was easy to get to. Im hoping to have the A/C going by August. I had a leak in the r12 system and since i didnt know where it was at, I decided to replace everything. I had already pulled a rear unit from 2005 van at the junkyard earlier in the year, so everything will be fairly up to date.
I did manage to get it together enough to drive it to the pump for some gas. Im hoping after tonight I can start driving to break the motor in.
I picked up my vacuum switch last night. Funny how the switch was 20$ but the pigtail was $30.
When i rebuilt the motor i changed out the condensor and heater core since everything was easy to get to. Im hoping to have the A/C going by August. I had a leak in the r12 system and since i didnt know where it was at, I decided to replace everything. I had already pulled a rear unit from 2005 van at the junkyard earlier in the year, so everything will be fairly up to date.
I did manage to get it together enough to drive it to the pump for some gas. Im hoping after tonight I can start driving to break the motor in.
September 4th, 2018, 12:20 PM
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Hello world,
I would start a new post about this, but the current thread is almost right on point.
I've been restoring a 1983 G20 for years, piece by piece. I finally got serious about fixing the engine control systems about a year ago. Many of the vacuum lines had gone soft or disintegrated, so I ran new lines all around.
The EGR bleed solenoid is the only outstanding problem. I cannot find it, or any evidence that it might have existed, but it is clearly indicated in the vacuum diagram, and I know the EGR has to bleed somehow.
The only thing I found in there, dangling at the end of a broken vacuum line, was a small white cylinder with 3 ports, about as big around as a nickel. It's not a check or delay valve- all those were accounted for. By process of elimination I have to assume this little device is some kind of analog pressure-differential EGR bleed valve. I cannot find a picture or any information whatsoever about this little guy, and certainly no clear information about what I should expect to find... the G-series seems to have a period of very poor literature in which they were rapidly changing the engine controls and such.
Anyway, I broke a terminal off the little white cylinder, so now I have to find an alternative.
My question: has anybody seen this thing before? ... or maybe, has anybody already come up with a way to upgrade the 1983 to a more modern EGR bleed control? I don't see wires for an electronic solenoid, but I haven't dug into my ECU yet to figure out if they exist or not.
I'm going to pressure test the device to figure out its function, and I can post the results and a picture of it later. I have ordered the 1983 light truck shop manual to see if I can glean any more info about it. I will post here if I find a solution. In the meanwhile, would be great to hear from the community at large.
I would start a new post about this, but the current thread is almost right on point.
I've been restoring a 1983 G20 for years, piece by piece. I finally got serious about fixing the engine control systems about a year ago. Many of the vacuum lines had gone soft or disintegrated, so I ran new lines all around.
The EGR bleed solenoid is the only outstanding problem. I cannot find it, or any evidence that it might have existed, but it is clearly indicated in the vacuum diagram, and I know the EGR has to bleed somehow.
The only thing I found in there, dangling at the end of a broken vacuum line, was a small white cylinder with 3 ports, about as big around as a nickel. It's not a check or delay valve- all those were accounted for. By process of elimination I have to assume this little device is some kind of analog pressure-differential EGR bleed valve. I cannot find a picture or any information whatsoever about this little guy, and certainly no clear information about what I should expect to find... the G-series seems to have a period of very poor literature in which they were rapidly changing the engine controls and such.
Anyway, I broke a terminal off the little white cylinder, so now I have to find an alternative.
My question: has anybody seen this thing before? ... or maybe, has anybody already come up with a way to upgrade the 1983 to a more modern EGR bleed control? I don't see wires for an electronic solenoid, but I haven't dug into my ECU yet to figure out if they exist or not.
I'm going to pressure test the device to figure out its function, and I can post the results and a picture of it later. I have ordered the 1983 light truck shop manual to see if I can glean any more info about it. I will post here if I find a solution. In the meanwhile, would be great to hear from the community at large.
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