Join Date: Sep 2007
Location: Vail, CO
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My 7.3 rpm jumps from 500 to 800 while idling. I changed the fuel filter, took my superchips tune off and still doing it. I don't notice it while driving but it starts jumping after I start it or drive it for a few hours.
I have heard something about a wiring harness under the valve covers?
What would be the best code reader to buy and diagnose with?
2002 F250 SD, CC, SB, auto, AFE stage 2, Wicked Wheel, DP Tuner
1999 Jeep TJ, 5.13's, HP 60, 14Bolt(both lincoln locked), 40" Creepy stickies, 110" WB