Liberty, Wrangler, 1997-2005

Gasoline Engine Tune-Up Specifications

Print

GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
19992.5P0.035A47-51AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20002.5P0.035A47-51AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20012.5P0.035A47-51AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20022.410.050A44-54AHYDHYD
  2.5P0.035A47-51AHYDHYD
  3.7K0.042A44-54AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20032.410.050A44-54AHYDHYD
  3.7K0.042A44-54AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20042.410.050A44-54AHYDHYD
  3.7K0.042A44-54AHYDHYD
  4.0S0.040A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20052.410.050ABAHYDHYD
  3.7K0.042ABAHYDHYD
  4.0S0.040A56-60AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
19982.5P0.035A47-51AHYDHYD
  4.0S0.035A47-51AHYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2A Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
3B Liberty:
 
label.common.footer.alt.autozoneLogo