Check my work re: Fuel pump failure?

What were the 2 wires that were "broken" ? Mice ? It could be additional wiring issues. The crank sensors are real fussy with radio interference, and if you're having wiring problems it can cause all kinds of problems like you describe. As said above, the only real way to determine a fuel delivery issue would be to hook up a fuel pressure gauge so you can read it while the problem is happening. Oil pressure will not increase due to the engine "working extra hard", the oil pump spins in relation to RPM regardless of load. Is it possible once the issue arose you are looking at the gauge more closely and feel the pressure is higher ? The only things that would really cause an oil pressure rise, is a plugged oil filter with a stuck bypass(highly unlikely), or a stuck bypass in the oil pump itself...again unlikely unless maintenance has been really poor. I suspect an issue with the gauge as you are already having problems with the fuel gauge....again maybe an electrical gremlin ?
Good Luck