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Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

vacuum pump

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Old 11-29-2011 | 12:47 PM
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LeRoy90laredo's Avatar
LeRoy90laredo
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Joined: Aug 2010
Posts: 692
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From: Tempe, AZ
Year: 1990
Model: Cherokee
Engine: l6 242
Default vacuum pump
My vacuum pump/booster is running every 3 seconds. All fluids are fine. Why is doing this?
A sign its going bad?
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