Hot water leaking on my foot (gas pedal) along with a sloshing water and sizzling noise.

Heater core or hose leak.

It sounds like you have an air bubble in the heater core. Try parking front upward on the steepest hill you can find, and run the engine hot, with the heater control on full, for about 5 min. That may shift the bubble out.

This could be a leaking brake vacuum booster.

All that has to be done is use the codes you have had
for months ,to diagnose the systems with faults & make
whatever repairs are necessary. No big deal

Just have to actually do something,not you, a repair shop

Sounds like your heater core is leaking. Or the hoses connected to it.

It`s most likely the heater core. If you can smell antifreeze and your windows fog up,it`s very likely the heater core.

Mine is doing the same thing!! I am having so many issues with that, gas sloshing, not cranking on the first try and odometer light going out!

Sounds like a vacuum leak. check your hoses while the car is running

Seems like an injector and valves. Check if all injectors are giving same pressure, none leaking or damaged, the injector pump working fine and all filter in the pump are clean (yes there are small filters inside under every electro-sensor), get valves gaps checked and adjusted. at this kind of mileage its a must.

Sounds like the sloshing noise is water in the a/c-heater box. The drain is probably plugged. I don't think the sloshing noise is causing the ragged running problem.