'04 rough idle/no power/fuel starvation
truck is an 04 f550,need it for work,was running awesome and getting good fuel mileage since egr delete,when it gets really cold(-15 20c), it seems to run like it gets plugged fuel filters and runs well up to 65mph,then no power after that,have to feather fuel pedal,last night,idled and ran well for 8 hours,then idled 4 hours(was -20c) and got onto freeway and got up to 65 and it started to lose power,had to pull over,and it was idling rough,gray/white smoke,would shut off and it fires right back up and go a 100 yards then lose power,finally got a buddy to tow me into a warm shop.,checked all connections and everything looked good,opened secondary fuel filter and only small amount in bowl,went to ford dealer and got filters and changed them both,thinking primary was plugged, primed system and she fired right up,but ran rough at idle,slowly increased fuel pedal in park, and she would smooth out at about 2500k rpm.,back to idle ran rough with a miss,opened air filter and checked filter,it is pretty clean (3 mos. old),sprayed a small shot of wd40 into air intake,(in place of ether),and she would grab that fuel and idle perfectly smoothly and normal,,thinking hcfm,,while running rough i did unplug the icp and she didnt change her rough idle,she got sweet runnin' with the wd40 added,the ficm is about a year old,new heads/gaskets/hpop/hi press. rails and 2 injectors replaced,,it starts fine,fires right up when you turn key just what appears to be this fuel starvation issue. I believe it has it's oem hcfm with 150k miles.
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2004.5 F-550,4x4,6.0,auto,CTS monitored,
Performance Machine egr delete,caterpillar elc,blue spring, CTS Monitor,flat plate agm batteries,K8 code, super tow pkg. (4.88),twin line recovery wrecker.