Compression Ignition Addict
Join Date: May 2009
Location: In the country south of Covington TN.
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My first thought was batteries but you say you had them tested. What amperage did they test out to? If not batteries I'd start looking at battery cables, ground cable and their connections.
Randy DuCharme (Radio AD5GB)
'06 F-250 FX4 A/T Super Cab short bed /w tow pkg
SCT SF3 tuner /w Gearhead Performance custom tunes. ARP head studs, EGR delete, oil cooler/drainback tube/STC coupler/blue spring/standpipe & dummy plug upgrades, ScanGauge II, Sinister diesel coolant filter, Fumoto drain valves, Stage II direct clutch and ECP solenoids.