I decided to test my carb bowl vent solenoids. With the air cleaner removed, I disconnected the hoses at the carb bowls and turned the ignition ON. Using a Mityvac pump to test, these solenoid-operated valves (SOV's) both appeared to be open. My understanding is that these vent SOVs need to be closed anytime the ignition is ON, per JACook's post in the following thread:
http://vb.foureyedpride.com/showthre...-5-0-Bowl-Vent
So I decided to pull the SOVs for inspection and test. This task was a little more difficult than I had hoped, but I got them pulled with no damage. Applying the leads to the battery (with the help of a spade connector and jumper wire), I saw that one SOV is OK (closes when energized), but the other one still whistles when I blow through it when energized. Since one SOV works, but both appeared to leak with the ignition ON, now I'm wondering if these are even getting energized. Both ground wires were bolted to the engine block and both connectors were connected. I'll check that electrical circuit next and also check for other hose leaks. Any other ideas?
I did notice that the two SOVs have slightly different part numbers (A1A vs. A2A). Perhaps one has been previously replaced? Is there any significance to the different part numbers? Is one just a later version?
E3ZE-9B982-A2A - silver Ford label, black ground wire, this one is not working (pictured)
E3ZE-9B982-A1A - blue Ford label, white ground wire, this one is working OK
I started searching for a replacement SOV, but am having trouble finding what I need. I checked NPD, Rock Auto, Green Sales, Foxresto, LRS ... nothing. I can find SOV's (Motorcraft CX239) on eBay and other sites, but in all pics the ground lead on these appears to be too short. As you can see in the pic, the ground lead needs to be about 3 times as long as the power lead. I suppose I could splice in more wire for the ground connection, but I hate to do that.
Any suggestions for where to find new replacement SOVs with the correct length ground wire?
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