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Old 02-13-2017, 03:11 PM   #1
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Jeep yj vacuum line disconnected

I heard a whistling sound coming under the hood by the firewall today and found this vacuum line to be the issue. When I pinch it the engine rpm's rise and it sounds much smoother. I am unsure where it is suppose to be connected, some care to help?

My Red 4wd vacuum line also is disconnected causing my 4wd to not work. It's my understanding it is suppose to go to the intake manifold somehow but I am unsure where. Anyone care to help with this as well?

1988 Jeep yj 4.2
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Old 02-13-2017, 08:03 PM   #2
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Where is that vacuum line coming from?

Look under your battery for a can or ball vacuum reservoir. Trace the vacuum line from that and see if you come across the other ends. I have a feeling that that is a vacuum line to that reservoir and 4wd system.


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Old 02-13-2017, 09:12 PM   #3
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I figured it out. There was a line that went behind the engine block where it had disconnected from. The red 4wd wire also connects into the second port.
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