How to know if your variable timing solenoid is bad?
How to know if your variable timing solenoid is bad? Symptoms of a Bad Variable Valve Timing Solenoid and How to Replace 1 Check Engine Light On. 2 Dirty Engine Oil. 3 Roughness in Idling Engine. 4 Decline in Fuel Efficiency. When to replace a variable valve solenoid ( VVT )? Now that you know what all symptoms indicate variable valve timing solenoid failure, you must also know that it is imperative to replace a faulty VVT solenoid. Once you have diagnosed a problem in the variable valve timing solenoid, it is best that you either get it replace or...