2003 6.0 stalls,no power, won't start..help!
New to me 03 f350 with 6.0 ran fine.... Then started bogging down .. Could not get above 1500 rpm.within 1 mile it stalled and would not restart. I pulled it back to the garage and changed the fuel filters. Motorcraft used. ..started...but only idled for 3 min then stalled. Will crank over but not start. Several times it started to chug but never really took off. If I let it set for 3-4 hours it will start only to not rev above 1500 rpm and stall in 3-5 min. Ficm voltage is 46 volts. No engine codes. Battery voltage is good. Fuel pump pumps fine to the upper fuel filter, no bubbles. Any ideas what else I should check? New to diesels but learning fast.....help!thanks!