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Old 02-18-2001, 06:11 PM
SW SW is offline
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Join Date: Aug 2000
Location: Houston, TX. USA
Posts: 590
The yellow "thing" is a check valve. It could be brittle and have a small crack somewhere that is causing the vacuum leak. It is very inexpensive to replace.
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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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