Join Date: Aug 2010
Location: Sassamansville, Pa
Thanked 195 Times in 157 Posts
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#4 cylinder isn't doing it's fair share of the work, the PCM realizes this and sets a code.
It could be anything from a injector going bad, to a chafed wire harness, and anything that has to deal with that cylinder to run 100%.
Your volts seem low to me, you might want to have your batteries and alternator load tested. Have you checked your FICM volts while cranking, KOEO, and KOER.
2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB