Help! My car drowns to accelerate thoroughly!

Good day and greetings to the great forum! I hope everyone is doing well. I'm writing to ask for advice based on any experiences you might have.

I have a 1998 Mitsubishi MX with a 2.5L 6-cylinder engine. The problem it's currently having is that when I accelerate suddenly (fully), the car stalls and is slow to respond. It's worth noting that I've had this problem since December 27, 2011. Four months before that date, the car had the same issues (leaving me stranded on an incline). At that time, with my limited mechanical knowledge, I tried troubleshooting (since the check engine light wasn't on). I replaced the fuel pump, fuel filter, air filter, spark plugs, spark plug wires, and cleaned the distributor. It turns out there was a short circuit in a wire; after replacing it, the car ran perfectly. Going back to December 27, 2011, the car showed the same problem; I decided to buy a new distributor cap and rotor. Since it didn't fix the issue, I scanned it and it showed a TPS fault (the only code it threw). I rushed out to buy one and installed it correctly. The problem persisted; I removed the IAC valve to clean it; then I cleaned the EGR valve (it was filthy); I cleaned all the car's ground connections. The MAF sensor works correctly since I tested it on another identical car. I swapped the spark plugs and tested their wires with a multimeter. In short, the car has this strange problem and I don't know what to do anymore. I'll take it to a mechanic who charges me to see if he can find the problem.

The car performs well at high speeds and feels comfortable, the problem is getting it out of neutral (manual transmission) since I have to rev it a bit higher than normal; but when overtaking or going uphill, the car tells me "get out and do it yourself."

PLEASE; ANY HELP OR COMMENTS FROM YOU WOULD BE GREATLY APPRECIATED. Thank you and sorry for the long message.