Join Date: Apr 1999
Location: Chugiak Alaska
Feedback Score: 0 reviews
I had a 96 that had the elusive start and run fine but quit in 1/2 mile if not warmed up below 30 degrees and lower problem. I don't remember it romping at all. I even made Klhansen come over and pull codes with no luck. Our local go to shop guy said he would look at it but I should try changing to a lighter oil in the winter. So I went to Rotella 10w-30 and the problem went away completely!! I would go with the Rotella 10w-30 if you can find it, if not a synthetic 5w-40 should also work fine.
I reread your first post, this problem. This is happening after you have driven for a while so the oil should be hot and flowing well. I don't know if the lighter weight oil will help. Next time you drive and get the oil hot when you stop pull the dipstick and see if you have any bubbles on the dipstick (foaming) once again this would be fixed by a oil change of any weight. I would only do one thing at a time, injector cleaner or oil change then drive a while so you know what helped.
Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019