If you don't have a gauge, some parts stores will rent the gauge or you can purchase one at the test equipment store site on this page.
Joe
Mar 10, 2009 at 8:18 AM
NITROJUNKI
MEMBER
1 POST
I may be too late on this but check the idle control valve. If replaced, be sure to reset computer by disconecting the batt for a few minutes. This resolved my problem with my 1500 ram 98
Jan 5, 2011 at 4:56 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.