LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 1990 >> Wrangler L6-258 4.2L VIN T 2-bbl >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Emission Control Systems >> System Specifications >> Maintenance Procedures >> Maintenance Schedules
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Maintenance Schedules






Emission Component

Emission System Elastomer Vacuum Hoses - Replace every 60,000 miles
Emission System Timer (Except Calif.) - Replace/Disconnect at 82,500 miles
Exhaust System - Check every 7,500 miles
Idle Speed - Check every 52,500 miles
Ignition Timing - Check every 52,500 miles
Oxygen Sensor - Replace every 82,500 miles
Spark Plugs - Replace every 30,000 miles
Spark Plug Wires - Replace every 60,000 miles