Compression Ignition Addict
Join Date: Oct 2011
Location: Chico, California
Thanked 238 Times in 229 Posts
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you can also try tapping the relay, sometimes this will jar some of the buildup off it and it will work.
if you hear a buzzing/humming under the hood its most likely the vacuum pump.
clikcing would a relay.
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99.5 f250 7.3 4x4 260k FF 160/30, PHP Hydra, S&B CAI, 4" Exhaust, RR Billet Wheel, Autometer Gauges, Transgo, Non-Ebpv Pedestal, High Flow Outlet, 08 Tow Mirrors.
Dad-2000 7.3 4x4 110k miles, Autometer Gauges, Superchips 1705, 6637, 4" Exhaust, BD Billet Wheel, TruCool Max