Join Date: Mar 2014
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2005 f350 6.0 hard starting after 12+ hrs of sitting
So my 6.0 has 39,000 miles on it and just in the last 3-4 weeks I've noticed after the truck sits all night, no matter what the temperature outside is, it takes 2 times of about 10-15 seconds of cranking on it before it will start when it finally starts I get a decent plume of white smoke and it runs as smooth as it did when it was new. Then it will start and run like normal throughout the day....even after sitting 8 hrs in the parking lot at work it still starts fine. The batteries had never been replaced and I thought maybe they were draining a bit overnight having an effect on the FICM, since they were so old I replaced them and it didn't help out the hard starting issue...but they were due so oh well I guess. Am going to have it scanned by a diesel tech on Friday but figured I would see if anyone else had any ideas.
The only thing that has been replaced on the truck was the EGR cooler replaced by ford. I know the STC fitting hasn't been updated and plan on putting on the screw in fitting replacement....outside of that stuff I'm not sure what else to look at.