Hydrogen Carbon Cleaning Service Performed on Toyota GR Yaris G16E-GTS in Nagano

孝一田﨑
1 day ago
6 min read

Customer’s Car: Toyota GR Yaris (G16E-GTS)

We recently performed a Hydrogen Carbon Cleaning service on a Toyota GR Yaris right here in Nagano.

Current Odometer: Approx. 33,590 km
Engine Specs: Toyota G16E-GTS / 1,618cc Inline-3 Intercooled Turbo
Performance: 272 ps (200 kW) / 6,500 rpm | 37.7 kg·m (370 N·m) / 3,000–4,600 rpm

This machine is Toyota’s pride—a newly developed, compact, lightweight, high-spec power unit. Featuring the advanced D-4ST (Direct-injection 4-stroke gasoline engine Superior version with Turbo), the GR Yaris is a legend in the WRC and All Japan Rally Championship.

Pre-Event Maintenance for the 2026 GR Yaris Owners Meeting

We completed this service just one day before the "2026 GR Yaris Owners Meeting in Jibusaka Kogen Ski Resort." The goal was a complete engine refresh to ensure long-term performance and reliability.

Since the G16E-GTS uses direct injection, we also focused on preventing future fuel line issues. We combined the hydrogen treatment with our FUEL SYSTEM CLEANER to clean everything from the fuel lines to the injector tips simultaneously.

The Service Process

Fuel System Protection: We added the FUEL SYSTEM CLEANER directly into the fuel tank.
Pre-Check: A thorough inspection of engine noise, vibration, and exhaust flow was conducted.
Hydrogen Gas Injection: We started the hydrogen flow at a conservative 100 ml/h. Monitoring the engine's real-time response, we gradually increased the hydrogen volume to optimize the carbon removal process.

Scroll down for the "During-Service Impression"! ↓↓↓ ↓↓

長野県 -トヨタ GRヤリス・G16E-GTS型水素ガスカーボンクリーニング施工実施 — 長野県でのトヨタGRヤリス、G16E-GTS型エンジンの水素ガスカーボンクリーニング施工の様子。赤いスポーティなデザインが目を引く。

To ensure the FUEL SYSTEM CLEANER circulated thoroughly through the fuel lines, we performed several throttle blips. A quick check of the idling gauge confirmed everything was stable.

5 Minutes In: Placing a hand near the exhaust tip, I began to feel a slight increase in moisture. The exhaust pressure and flow remained consistent and healthy. I began fine-tuning the hydrogen injection volume while monitoring the engine's response.
10 Minutes In: Visible water vapor started emitting from the exhaust—a clear sign that the hydrogen was reacting and the cleaning process was underway.
25 Minutes In: A noticeable change occurred: engine noise and vibrations significantly decreased. At this point, I locked in the hydrogen flow rate to maintain this optimal cleaning state.
45 Minutes In: Checking the exhaust again, the airflow felt much smoother than at the start of the session. I opened the throttle once more to check the idling gauge; the needle now dropped much more fluidly and responsively compared to the initial pre-service check.
50 Minutes In: The moisture at the exhaust tip began to dry up, indicating that the internal cleaning was reaching its peak. I continued the service with final adjustments to the hydrogen levels.
60 Minutes In (Completion): After one hour of treatment, the idling was rock-solid. The engine sound, vibration levels, and exhaust flow were all perfectly stabilized. The service was successfully completed.

The injector cleaner used for this service is our featured FUEL SYSTEM CLEANER. It offers exceptional cost-performance, effectively cleaning everything from the fuel tank to the injector tips.

[ Post-Service Impression & Feedback ]

We received some fantastic feedback from the owner following the service:

"I can truly feel the difference! To be honest, I was skeptical about how much hydrogen cleaning could actually change the car—but I was genuinely surprised."
"The engine revs much more freely now; the response is excellent."
"When I stepped on the gas, the acceleration was almost intimidating! I haven't felt that kind of power since the car was brand new."
"I've already decided to bring my wife’s car in for the same treatment next year."

Why Hydrogen Cleaning Works: The Science of "Engine Refresh"

It is incredibly rewarding to hear that the owner felt the results immediately. Many drivers underestimate how much carbon buildup negatively impacts engine health and performance.

By removing carbon deposits from the intake, pistons, and especially the exhaust valves, we optimize the exhaust efficiency. As the exhaust flow improves, the engine can draw in fresh air more effectively (improved scavenging). This leads to:

Enhanced Combustion Efficiency
Increased Power & Torque Output

Not a Tuning Part—A Return to Peak Performance

It is important to note that we didn't add any aftermarket tuning parts. This service is strictly a deep cleaning designed to unlock the engine's original, intended performance. The "scary" acceleration the owner experienced is simply the G16E-GTS engine performing exactly as Toyota engineered it to.

Long-term Care for Your Beloved Car

Since we also used the Injector Cleaner, the effects may become even more noticeable after driving for a while as the fuel system continues to clear out. We recommend this as a regular maintenance routine based on mileage to keep your car "happy" and running smoothly.

We look forward to seeing you (and your wife's car!) again soon. Thank you for choosing us for your GR Yaris maintenance. If you have any questions or concerns, we are always here to help.

Keep enjoying the drive!