cold no start

[AMBUSH OUTFITTERS BC]

well changed my oil and fuel filters in my 2003 6l f350 4 day ago and develop this problem once the engine cools down it will not start, it fires on one or 2 cly and try's to and if you keep at it it will start after 5 or 10 try's at 3 to 5 minutes a time it evnchey start 1 cly at a time tons of black smoke for 3 to 5 minutes and Finlay clears out and hits on all 8 cly.it has oil psi well cranking, I was thinking a vacuum leak in the fuel filters i changed. but here the stumper if i plug in the block heater it starts right up. the temp here is -6 c to + 6 c . but before this it started at -10 c to -15 c not plug in it starts. this all happened right after i did the oil and filters. thanks Shane

[2 stroker]

Originally Posted by AMBUSH OUTFITTERS BC

well changed my oil and fuel filters in my 2003 6l f350 4 day ago and develop this problem once the engine cools down it will not start, it fires on one or 2 cly and try's to and if you keep at it it will start after 5 or 10 try's at 3 to 5 minutes a time it evnchey start 1 cly at a time tons of black smoke for 3 to 5 minutes and Finlay clears out and hits on all 8 cly.it has oil psi well cranking, I was thinking a vacuum leak in the fuel filters i changed. but here the stumper if i plug in the block heater it starts right up. the temp here is -6 c to + 6 c . but before this it started at -10 c to -15 c not plug in it starts. this all happened right after i did the oil and filters. thanks Shane

You did use Ford or Racor filters and you need to use a 5w40 Syn oil but it sound like you FICM is bad. Need to check your batteries weak or bad batteries will kill the ficm.
They come stock with a 750CCA batteries i would put in nothing less than a 850CCA battery. The price of a new ficm around $1100 or you can have your rebuilt at BPD Repair Ford FICM Module for $300
or--- FICM Repair.com - Your Source for FICM Repair My choice
Info here http://www.fordtechservice.dealercon...FICM_Guide.pdf
and here http://swampsdiesel.com/site/install...ge_Testing.pdf
Testing the FICM

Ford 6.0 FICM Testing & Removal Instructional Video - YouTube

Ford 6.0 FICM Testing & Removal Instructional Video - YouTube

I hard wired a Battery Tender Plus into the passerengerside battery had to get new nuts and bolts because the stock ones get screwed up removing then when it set for a long time i just plug it in they come with 2 sets one a clip and the other to hard wire then i just set it up by the AC unit plug in close the hood, keeps them charged at 100% all the time when it sets.
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2 stroker

[AMBUSH OUTFITTERS BC]

but if it's pluged in it starts fine and runs all day. could the ficm do that if it was no good.

[PSDMikeB]

The warmer temps will allow a failing FICM work a little better. Just check your batteries and FICM.

MikeB

[AMBUSH OUTFITTERS BC]

will do on the weekend thanks for all the help guys. will let know how it go's

[2 stroker]

If you get something like the ScanGauge - Trip Computer + Digitial Gauges + ScanTools for about $150 you will be able to read everything on the gauge or you can spend a few more dollars and get the Edge CTS this will read everything also, my choice
Edge Inisight CTS
2 stroker

[AMBUSH OUTFITTERS BC]

ok its the 7 post ficm with key on 47.9 volts well cranking 47.9 volts. it hits on 1 or 2 cly but wont fire up when block heater pluged in starts fine. ?

[Turbostang500]

Im going to say you have too thick of oil (15w40) and needed 5w40 for your temps
and/or the gp system isnt functioning right.

Check your gpr and ohm test the gp's.

[Turbostang500]

Wait!
Does the 6.0 have a gpr or glow plug module?

[AMBUSH OUTFITTERS BC]

It was the next morning after the oil change, are they that finicky and i do have a parts truck i swap glow plug module still the same pulled both fuel filters just to check all looks good. what is a gpr and gp's. not plug in it will start but your cranking it hits one 1 or 2 cly with the key in start as so as you let go it stops , trying not to burn the start out you do this 5 to 10 times it finely stays running on 3 or 4 at abut 400 rpm and is poring black smoke out the pipe like a badly flooded gas engine if you touch the throttle it dies if left a lone it clears out Gaines a cly or 2 every 3 minutes and finely all 8 and runs fine the res or the day.let me know where the gpr and gp's is and i will check. thanks for your time. Shane