Engine Controls - Adjustments

• Engine Mechanical
  • Engine Compression
  • Valve Clearance
• Ignition Timing (Gasoline)
  • 4-Cylinder Ignition Timing
    • 2.5L (VIN E)
  • V6 Ignition Timing
    • 2.8L (VIN R)
    • 3.1L (VIN D)
    • 4.3L (VIN Z)
  • V8 Ignition Timing
    • All Models (Except Diesel)
• Injection Pump Timing (Diesel)
  • 6.2L (VIN C & J)
• Idle Speed & Mixture
  • Gasoline
    • Notes
    • Minimum Idle Speed Adjustment (7.4L Only)
  • Idle Speed (Diesel)
    • Curb Idle
    • Fast Idle
  • Purging Fuel System (Diesel)
• Throttle Position Sensor (TPS)
  • TPS Adjustment (Gasoline)
    • Notes
    • 2.8L (VIN R)
  • TPS Adjustment (Diesel)
    • 6.2L Light Duty (VIN C)
    • 6.2L Heavy Duty (VIN J)
• Vacuum Regulator Valve/ Detent Switch Adjustment (Diesel)
• WASTEGATE Actuator Adjustment (Turbo)