5 Common Symptoms of a Bad Variable Valve Timing (VVT) Solenoid
1 – Check Engine Light.
2 – Rough Idling.
3 – Rough Acceleration.
4 – Increased Fuel Consumption.
5 – Low engine performance.
Suggest you check your fuel trims if they are excessively negative, you have a rich fuel mixture ( #4 ) that may affect O2 sensor operation