12 genesis 5.0 r spec having pulsating acceleration issues!!!!

[Autotech87]

Hey I have owned this 12 genesis 5.0 precious for about 8 months and it’s been doing this weird thing with the acceleration since after the first few weeks. It’s got 141k and I’ve already changed the spark plugs, throttle body, pcv valve as well as the purge. The car at times will feel like it chokes……while your driving and slow down and decide to speed back up is usually when I notice it and I haven’t had a cel light on since the beginning and I’ve plugged in my scanner but there are no codes. Someone please tell me what to do as I want to keep this vehicle

 

[Gunkk]

IMO, the ECUs in our cars can be a bit over-tolerant of rough running without throwing codes. If the fuel trims are unstable, check for intake/TB/manifold air leaks. Also, check your coils and injectors for proper function.

 

[JEBIV]

When you replaced your throttle body did it have a new TPS ? Typically a TPS with a bad spot will not set codes but can create acceleration issues.

 

[Autotech87]

When you replaced your throttle body did it have a new TPS ? Typically a TPS with a bad spot will not set codes but can create acceleration issues.

It did not but I just purchased a new TPS and will update later this week once installed. This is the last thing I can do and hope it’s just a faulty acceleration pedal or TPS

 

[Autotech87]

IMO, the ECUs in our cars can be a bit over-tolerant of rough running without throwing codes. If the fuel trims are unstable, check for intake/TB/manifold air leaks. Also, check your coils and injectors for proper function.

Yes checked into all of that and everything I take out looks brand new and spotless

 

[G-982134]

It did not but I just purchased a new TPS and will update later this week once installed. This is the last thing I can do and hope it’s just a faulty acceleration pedal or TPS

Did you find the problem mines doing the same?