Hi my names Annie and I am no where near a mechanic. I have a black f350 6.0 six speed single cab. She’s been rude lately and I was wondering if I could get some onsite because I saw a similar post when I googled my problems. In the same spot twice now on my drive to work I have been in fourth gear and the rpms start to gradually go down no matter how hard I press the gas, I have to downshift so she doesn’t chug and the same thing happens in third second and first until I’m just sitting there in the road idling. I let it idle for a time and then put it in first and try to roll but she quits, I figured she was gelling up so I put that diesel degeller in it yesterday and thismorning when it did this. Then I gave it a minute to settle and tried to start it again. It turned over and shook and chugged but didn’t fully start a couple times but on the third try it usually starts and I did fine the rest of the day yesterday but today it started to do the same thing after like 200 ft but I was near a gas station so I just did a few laps around it in second so she’d warm up and she made it to work but barely. I hate going to a mechanic because they’re expensive and they don’t let me watch what they’re doing so I know how to fix it next time. Any input is great please and Thankyou.