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post #1 of 5 Old 01-05-2013, 10:33 AM Thread Starter
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question need help

05 6.0 been having cold start issiues .truck sits quite a bit doesn't get driven daily . noticed the last couple times starting it fires up but runs real rough for a few seconds and then starts to clear out . once it starts it won't run rough at all it runs perfect ,only does this the first time its fired up . been doing some reading on ficm not sure if this could be it or should i be changing fuel filter or something more simple!!THANKS STROKEDIS

05 sd ,banks six gun tuner ,arp head studs ,bullet proof diesel egr cooler,upgraded fuel pump,upgraded fuel regulator banks air filter , turbo back 4 inch exhaust, 8 " lift 37's with 4.56 gears
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post #2 of 5 Old 01-06-2013, 10:58 AM
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have you checked for codes? do that first.
if no codes, check the ficm voltage KOEO cold, then cranking, and then KOER. see if it drops below 46v. if not, it's likely gonna be some failing injectors

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post #3 of 5 Old 01-11-2013, 05:32 AM Thread Starter
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no codes, I'm leaning towards the ficm,wouldn't injectors run like crap all the time or at least be intermittent.I'm going to check voltage this weekend before my Seahawks whoop that falcon ***.STROKEDIS

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post #4 of 5 Old 01-11-2013, 05:56 AM
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hard start/rough run cold are symptoms of either the injectors or ficm or both. often times the ficm voltage is low which causes the failure of injectors. so if the voltage is low and you replace/repair the ficm, don't be surprised if you find some failed injectors as well after reinstalling the ficm. also, anytime the ficm is condemned, i'd recommend a thorough charging system test be performed as well

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post #5 of 5 Old 01-11-2013, 06:17 AM
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Just a shot in the dark but are you running dino oil or synthetic? I final changes over to T5 rotella and it made a night and day diffrence in the cold morning starting habits. And after the Archoil treatment its even better.
Something to consider anyhow. Oil change is pretty easy compared to injectors...

BPD OIL COOLER W/COLD WEATHER PACK & BPD oil bypass amsiol filter
BPD WATER PUMP, RADIATOR+ EGR.ARP STUDS
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5" TB DIAMOND EYE EXH
ATLAS 40
TITLE IN HAND...
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