Rough Idle, Sluggish Throttle, or Poor Fuel Economy? Liqui Moly Valve Clean 7701 — Remove Intake Deposits & Restore Performance Fast

Carbon deposits on intake valves are the leading cause of rough idle, hesitation, and reduced fuel economy in port-injected engines — and they can’t be cleaned by fuel injector cleaners alone. In most port-injected gasoline engines, fuel is sprayed directly onto the intake valves, which over time allows oil vapour and combustion byproducts to bake onto the valve faces and stems. When deposits build up, airflow is restricted, valve seating is compromised, and combustion efficiency drops. ⚡ Intake valve deposits are one of the most common causes of performance degradation in high-mileage port-injected engines. Liqui Moly Valve Clean 7701 is the targeted treatment that dissolves intake valve deposits, cleans the combustion chamber, and protects the entire fuel system from corrosion — restoring smooth operation and optimal combustion.

❓ When Should You Use This?

Use Liqui Moly Valve Clean 7701 when ANY of the following apply:

• ✔ Your vehicle has a port-injected (not direct-injected) gasoline engine
• ✔ You notice rough idle, hesitation, or stumbling at low RPM
• ✔ Fuel economy has declined without an obvious mechanical cause
• ✔ Engine has 80,000+ km and has never had a valve cleaning treatment
• ✔ Vehicle has been stored for an extended period with fuel sitting in the system

🔧 Problems This Fixes

• Rough or unstable idle caused by restricted airflow past dirty valves
• Hesitation or stumbling on acceleration from low RPM
• Reduced fuel economy from incomplete combustion
• Sluggish throttle response that worsens over time
• Increased emissions from carbon-fouled combustion chambers

✔ One treatment added to the fuel tank dissolves deposits on intake valves and in the combustion chamber.

✔ Provides ongoing corrosion protection throughout the fuel system.

📦 Product Details

• Part Number: 7701
• Brand: Liqui Moly — Made in Germany
• Application: Add to fuel tank — treats port-injected gasoline engines
• Compatible Engines: Port-injected 4-stroke gasoline engines
• Also Cleans: Combustion chamber, fuel lines, injectors, carburettor passages
• Additional Benefits: Corrosion protection, prevents carburettor icing, environmentally friendly formula

⚙️ How to Use

Skill Level: Easy — Under 2 minutes. Add the entire contents of the bottle to the fuel tank before filling with fuel. Drive normally — the treatment works through the fuel system during regular operation. For best results, use at every second or third oil change interval, or whenever performance symptoms are noticed. Compatible with catalytic converters and oxygen sensors.

💡 Pro Tip