Check your vacuum lines and intake manifold.. I have a intake manifold vacuum leak, i've gotta fix soon!! My truck idles real high around 1500 to 1800 rpms then idles real low sometimes where it's about to die.. I got a tip from a friend to spray some quick start or WD40 around my vacuum lines and around the intake manifold.. He said if i have a leak it will idle faster.. Well guess what? When i sprayed around the intake the idling got much higher.. So be sure you check the vacuum lines and intake..

__________________
ALL JACKED UP..... 4.0 V6 manual 5 speed, K&N cold air filter system, Helix high tower throttle body spacer, 33/12.50r15 BF Goodwrench A/T, 456 gears, 4" suspension lift, 3" body lift, james duff arms, fox racing shocks, superlift springs, dual exhaust, flowmaster super 10, Pioneer DEH-X9600BHS, Polk Audio MM series speakers and 10" subs, Polk Audio Amps, Rockford fosgate wiring and capacitor, Streetglow lights.. http://www.jamesduff.com/
http://streetglow.com
http://facebook.com/clinton64xl