Toyota Vios 1.3 (2014) has❗ low power / weak acceleration and you suspect cylinder head valve damage❗: 4 weeks work busy later ✅ Symptoms of Broken / Burnt / Bent Valves If the valves inside the cylinder head are damaged, you will often notice: Engine Performance Low power (mahina ang hatak) Rough idling (uga-uga) Hard starting Misfire on 1 or more cylinders Mechanical Signs Low compression on affected cylinder Backfiring (sa intake or exhaust) Ticking / tapping noise from the head Exhaust Signs