Cruise control was on, batteries were fully charged, and everything was at 100% in terms of repair.
As far as being too heavy… I should say I’ve resorted to cheating on a backup save at this point, I just want the thing to work. But I’ve installed three V12 engines, the gasoline to fill the tanks (I put it in the tank, too!) and any configuration of (armored) wheels you can think of, and it does not run. It says it’s going at over 300mph, but all I see is smoke coming from the back of the vehicle and no moving forward.
I’m not continually pressing s either, I promise. I’ve driven vehicles before - made my own before, even - I just can’t figure out why this particular one doesn’t run.