Preparation and Initial Cleaning

Step 1: External Cleaning

• Immerse the injector in gasoline or cleaning solution
• Carefully remove external oil residue
• Wipe clean with a soft cloth
• Critical Check: Inspect rubber seals for damage
  • Replace damaged seals immediately

Professional Cleaning Process

Step 2: Ultrasonic Cleaning Setup

• Pour 2000mL of specialized injector cleaning agent into ultrasonic cleaning tank
• Install cleaning rack
• Place injectors on rack
• Ensure cleaning solution covers rack surface

Step 3: Ultrasonic Cleaning Parameters

• Power on ultrasonic cleaning machine
• Activate ultrasonic function
• Default cleaning time: 10 minutes
• Recommended setting: 600 seconds

Step 4: Backwash Process

• Connect backwash adapter to injector
• Mount on test rack
• Adjust oil pressure: 20-400 kPa
• Activate cleaning key

Step 5: Post-Cleaning Procedures

• Shut down oil pump
• Disconnect injector connection head
• Remove and separately handle seal rings

Detailed Cleaning Techniques

Carburetor Cleaning Method

• Use carburetor cleaning liquid
• Clean injector inlet and outlet carbon deposits
• Apply 12V voltage
• Connect cleaning solution via fine tube
• Use black tape to adjust tube diameter if needed

Cleaning Execution

• One person holds injector
• Another person intermittently activates 12V power
• Continue until spray mist is fine and uniform

Warning Signs of Injector Blockage

Performance Indicators

• Increased engine carbon deposits
• Delayed throttle response
• Sluggish acceleration
• Power reduction
• Increased fuel consumption
• Engine vibration

Precautionary Measures

Dos and Don’ts

1. Avoid Aggressive Throttling
   • Prevents further injector damage
   • Reduces risk of complete injector failure
2. Diagnostic Approach
   • Identify root cause of blockage
   • Prevent recurring issues
   • Minimize unnecessary component replacement

Blockage Classification

• External Blockage
  • Caused by ash and carbon deposits in combustion chamber
  • Treatable with specialized cleaning agents
• Internal Blockage
  • Resulted from fuel quality issues
  • Requires targeted cleaning solutions

Recommended Cleaning Agents

• Use PNF-type additives
• Ensure high-quality, effective cleaning solutions

Key Recommendations

• Systematic diagnostic approach
• Professional cleaning techniques
• Regular maintenance
• Use high-quality fuel and additives

Technical Insights

Conclusion

Proper injector maintenance requires systematic approach, professional techniques, and understanding of underlying performance issues.

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