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1987 Brougham D'Elegance
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Discussion Starter #1
Cleaning up the engine bay while swapping out a new vapor solenoid valve.

Took the car back from the mechanic some time ago and saw the oxygen sensor unplugged. Now this. Related?

574588
574589
 

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'84 Eldorado and Seville
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1,253 Posts
Looks like maybe the vapor canister solenoid. Part number 1997176 maybe.
The parts catalog lists that for '86 - 90 for the 307Y engine and '88 - 90 5.0L.

Starting in '88 it lists a bracket, 10498774

I can't quite tell from this eBay seller listing photo. Possibly they changed the design or yours is missing a cover. .

 

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Hard to tell by the pic.
These cars had a lot of vacuum controls.
Could be EGR, purge, air injection, or.
Some of these cars had anti diesel, & vacuum idle speed.

1st I would look at the underhood vacuum sticker to see what your choices are.
Thru a process of elemination you may get it that way.
In the diagram they draw it in relation to where the relitive location of the part is.

If any hoses are still connected, trace it back & compare to vacuum diagram.

Look for any port markings like "can", "carb", "1 & 2" etc.
Look for a part number.

Last case if you had a computer engine wiering diagram you could figure it by the wires.

Hard part about matching it up is designes may have changed, so replacement part pics don't look the same.

Looks like it's melted a bit along with the wire.

Depending on the factory these 307's had a different vacuum systems.
 

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'84 Eldorado and Seville
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The GM Parts Giant website shows they still sell it a bit higher than the eBay seller.
 

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'84 Eldorado and Seville
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Seems like my '90 Fleetwood RWD has one like this in the eBay listing. One end of it is open. It puzzled me when I saw it because I thought it was strange that vacumn lines were connected and one side had an open port. I suspect that is what the part is.

 

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1987 Brougham D'Elegance
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144 Posts
Discussion Starter #7
This gives me some food for thought. I have the shop manual so weather permitting, I'll go out and start tracing vacuum lines / wires.

Thanks everyone!
 
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