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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Is there anything in particular that I should be looking for when checking the vac lines? If I don't see any physical damage to the lines, how can I test them?
Read the link I posted. The lines could be fine, but the check valves could be bad. The control panel on the dash could be bad too, but only you can determine that.