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RPM surges: '03 F-350 DSL (6.0)
RPM surges at idle, in gear & out of gear, and noticeable surges prior to gear changes. My dash lost power briefly (4 times - it was like I flipped a switch and the whole dash went dead)but came back on within 30 - 60 seconds, and the truck has shut off twice (with no trouble re-starting).
Batteries were replaced 6 months ago with addition of 4" intake and exhaust. Hypertech HyperPAC installed. Used Stage 1 (Stage 1= +37HP +64TQ). Everything ran fine till about a month ago. Fault codes on Hyperpac: PO404: exhaust gas recirculator control circuit PO405: exhaust gas recirculator sensor "A" circuit low Have just cleared all codes, and will take for a test drive (to see if any codes re-appear). |
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