2026-07-20 · 4 min read
Toyota Vios Carbon Cleaning — Throttle Body & Intake Walnut Blast
Rough idle, hesitation on acceleration or increased fuel consumption on your Toyota Vios could be caused by carbon buildup on the throttle body and intake valves. What's involved and what it costs.
Carbon deposits build up on the throttle body and intake valves of the Vios 1NZ-FE and 2NR-FE engines over time. These cause rough idle, hesitation on acceleration and higher fuel consumption.
Cleaning Options
- Throttle body clean: RM 50–100, takes 30 minutes — most common and most affordable
- Chemical induction clean (intake valves): RM 150–300 — for heavier buildup
When to Clean
- Every 40,000–60,000 km as preventive maintenance
- When rough idle isn't fixed by new spark plugs