Cherokee, Grand Cherokee, 1999-2005

Gasoline Engine Tune-Up Specifications

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GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rpm)Valve Clearance
              IntakeExhaust
19992.5P0.035-47-51-HYDHYD
  4.0S0.035-47-51-HYDHYD
  4.7N0.040-47-51-HYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2- Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rpm)Valve Clearance
              IntakeExhaust
20002.5P0.035-47-51-HYDHYD
  4.0S0.035-47-51-HYDHYD
  4.7N0.040-47-51-HYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2- Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rpm)Valve Clearance
              IntakeExhaust
20014.0S0.035-47-51-HYDHYD
  4.7N0.040-47-51-HYDHYD
1Note: The information on the Vehicle Emission Control labe must be used, if different from the figures in this chart.
2- Ignition timing and idle speed are controlled by the PCM. No adjustment is necessary.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20024.0S0.035A47-51AHYDHYD
  4.7N0.040A47-51AHYDHYD
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.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20034.0S0.035A47-51AHYDHYD
  4.7N0.040A47-51AHYDHYD
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.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20044.0S0.040A47-51AHYDHYD
  4.7N0.040A47-51AHYDHYD
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.
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance
              IntakeExhaust
20053.7K0.042A56-60AHYDHYD
  4.7N0.040A56-60AHYDHYD
  5.720.045A56-60AHYDHYD
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.
 
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