I have a 2004 hyundai tiburon and everytime i start it the throttle is like stuck and just keeps going until it hits redline. i pulled the codes and it said throttle position sensor so i replaced it along with the idle air control valve and there is no codes anymore but problem is still the same. i dont know whats wrong with it and need help.

In order for a fuel injected engine to ran way up to redline,it has to be a combination of

air
Clean Mass Air Flow senor and connector with CRC Mass Air Flow sensor or electrical part cleaner.

fuel,
Check fuel pressure at fuel rail

ECU


incorrect / grounded / damage wiring on the TPS.


Throttle cable linkage
Smooth throttle movement?


Carpet under the gas paddle (like Toyota?)


My best is a grounded and short TPS.

Thats a good one.