2003 f250 6.0 starts dies - starts dies- starts runs fine when warm
Hey everyone new here! Normally I can do a search but didn't have any luck! I just bought a 2003 f250 king ranch fx4 6.0 164,000 miles. When I bought the truck he told me it had a egr delete kit, new oil cooler, new fcim and new hpop but had no receipts to show. I did confirm it has a IPR delete kit and rebuilt fcim so I don't thank he's lying about it.
My problem is when I go to start it and it's been siting over night or all day it will start right up but die almost a few seconds later I can start it back an it will run a bit longer then die again normally the third time it will stay running and I won't have another problem with it. I have changed oil and filter with rottela t. New motorcraft fuel filters and a new air filter. Also I have tested my ficm and got steady 46 volts.
So I'm kinda stuck I really thought it was the fuel filters but it wasn't any help would be great! Thanks