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Unread 10-30-2013, 04:44 AM   #1
BigBlue77
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Hi. I have an 80 cherokee Laredo that has the 360. I've followed the vacuum diagram to a tee until I've reached the 'VSD'. I see by the diagram it ties into a tee and goes to the egr valve. HOWEVER, all I have is a vacuum hose at the tee. It goes to nothing. Does anyone know what the VSD looks like and what it does? Thanks

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Unread 11-05-2013, 09:19 AM   #2
laybackman
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Is this the bad boy;



Found it here at post #1516;
http://www.jeepforum.com/forum/f8/wo.../index102.html

It is a Vacuum Sense Dump valve. I'll bet many 1980's vehicles had them as part of their EGR system.
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Unread 11-06-2013, 08:49 AM   #3
BigBlue77
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Thank you. I appreciate your help! I was actually able to read up on that. I found this one on eBay. The seller says he tested it and it dumps below 5 inches. I couldn't find the specs so hopefully that's what's it's suppose to do. I'll post after it arrives and let you know how it works out. Not that I may or may not notice a difference! Thanks for taking the time to reply! Adam

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Unread 11-08-2013, 05:05 PM   #4
BigBlue77
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Ok. So today the part arrived and low and behold it looks exactly like a part already on the Jeep. Yup, in an idiot! ANYWAY,,,apparently I need an EGR TVS.(Thermal vacuum switch) part B on this diagram. Anyone know where to get one or what it looks like in real life? Thanks, Adam

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Unread 11-08-2013, 06:29 PM   #5
laybackman
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I'll get you a bit closer;
Post #12

http://www.jeepforum.com/forum/f8/ai...parts-1141414/
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Unread 11-08-2013, 06:33 PM   #6
laybackman
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Better information post #11;
http://www.jeepforum.com/forum/f8/ai...sensor-508819/
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"Once good behavior becomes the exception and not the rule your society has begun to fail…..we are there." laybackman

If your girl is throwing gang signs with her toes you're hitting the spot.

"If we cannot afford to take care of Veterans, then we should stop making them."
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