Stutter on acceleration.
Hello.
Have a problem with my car.
It stutters on acceleration.
It happens on every gear. Sometimes it's hard to even accelerate, but oither time I can drive fluently with small stutters here and there. Feels like an issue with fuel system or ignition system.
But
No check engine light
Replaced spark plugs
Replaced ignition coils
removed and tested injectors.
Managed to get a new fuel pump. It's waiting for replacement.
Maybe someone had similar issue. I have no idea what it is. Local Toyota dealer is helpless.
Local tuners and mechanics can't help.
Edit
One other thing to add. Every time I replace a part, car will behave normally for some time (like 1-2 hours of driving). After this time stuttering is coming back.
Sent it to Toyota, they replaced fuel pressure sensor, car was driving perfectly for a few hours.
Stuttering came back, local shop replaced spark plugs and ignition coils, perfect behaviour for an hour.
Removed and tested injectors, you guessed 2 hours of perfect behaviour.