1. Rough idling. If your Avalon's engine is idling roughly, it could be a sign that the spark plugs or fuel injectors need to be cleaned or replaced.
2. Stalling. If your Avalon stalls frequently, it could be a sign that the fuel filter is clogged or the ignition system is faulty.
3. Poor acceleration. If your Avalon hesitates or struggles to accelerate, it could be a sign that the air filter is dirty or the fuel pump is failing.
4. Increased fuel consumption. If your Avalon is using more fuel than usual, it could be a sign that the oxygen sensor or catalytic converter is faulty.
5. Check engine light on. If the check engine light is on, it is important to have your Avalon diagnosed by a qualified mechanic as soon as possible.
In general, it is recommend that you have your Toyota Avalon tuned up every 30,000 miles or so. However, this interval may vary depending on your driving conditions and habits. If you drive in dusty or dirty conditions, for example, you may need to have your Avalon tuned up more frequently.
