This morning, I started the truck to move it up the drive way for the street sweeper. It started up fine and reversed up the drive way with no issues.
After the sweeper passed, I drove it back down the drive way under its own power, without giving it any gas. Once onto the street, I gave it some gas and it started stumbling again. I put it in Park and revved the engine. I hesitated slightly around 3,000 rpm. I then slowly drove it in Forward and Reverse along the side walk several times. It would stumble in Forward, but no issues in Reverse.
I put it back in Park, revved the engine close to 4,000 rpm, and it did so with no issues. It began idling at around 1,000 rpm, vs 750 rpm initially. I then drove the truck up and down the street and it drove and shifted like normal: a little hard in 1-2, and then somewhat hard in 2-3.
I am still at a loss as to what is going on. It almost sounds as if revving the engine cleared up something fuel related. Any ideas?
EDIT: Gonna check the clear fuel filters first chance I get to see if the fuel is crap (again). Hopefully no later than tomorrow.