2005 hyunday xg350 has no power when press accelerator . Can anyone help me please

https://m.carcomplaints.com/Hyundai/XG350/2005/seat_belts_air_bags/air_bags-3.shtml

https://www.kbb.com/hyundai/xg350/2005/recall/

I have a 2004 xg350. Mine did the same thing, first it started out with a mass air flow sensor code, so I put in a new mafs and that worked for a couple days then started doing the same thing again. When started the rpms go up and down by its self then settles out but drives fine. Changed the throttle position sensor, no luck, in the end I cleaned the idle air control valve and that worked for a week. Then started doing it again, so I cleaned it again and worked good. I haven't replaced the idle air control valve yet because they want $300 for it but that's what you need to do. Also when you clean or replace it unhook the battery while doing it so the computer resets

Please watch the video at the link. 2001 2005 Hyundai XG350 Interior Fuse Check 2002 Hyundai XG350 3 5L V6

you should have pwr w the key on at all times at that fuse. Bad relay or short in ignit system.

Do not blame you for being worried to drive, this is a very dangerous position to be in. Do you have the error codes written down, are there presently any error codes. this info is needed to diagnose problem. RE POST IF YOU CAN SUPPLY MORE INFO< ALONG WITH YOUR QUESTION
below is a link to trouble shoot your issue,
press the helpful button

Diagnosing Intermittent Stalling Issues

Hyundai XG350 alarm module Questions & Answers - Fixya

www.fixya.com > ... > Tags > alarm module > Cars & Trucks > Hyundai
Hyundai XG350 cars & trucks alarm module questions and answers. Ask your Hyundaialarm ... TURN IGNITON TO ON 4. WAIT 5 ... Hyundai Motor 2005 XG350.

Splice the camera power wire into one of the backup light bulb sockets at the rear of the car. Make sure there is a good ground connection to the camera housing too. It's best to add a ground wire so there will never be a power problem at the camera.

That hissing could be a vaccuum system leak, have youe tried pinpointing the sound from under the hood?

cars these day are all electronic
the exhilarate in your car is electronic the older cars used to have a cable that ran to the motor now they dont
these days the exhilarate is like a volume knob on a cd player, it tells the car to produce more power on not to.
it sends the message to the throttle body
the throttle body is in charge of mixing the air to fuel ratio more fuel more power your emmissions system is the exhaust system
all of this could be linked to the throttle body being damaged
if you want to know more just ask
hope it helps
ricko