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1991
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Wrangler Base, 2.5 P
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Engine Controls - Basic Testing
Engine Controls - Basic Testing
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Introduction
Preliminary Inspection & Adjustments
Visual Inspection
Mechanical Inspection
Compression
Exhaust System Backpressure
Fuel System
Notes
Fuel Pressure Release (2.5L & 4.0L)
Deadhead Pressure (2.5L & 4.0L)
Fuel System Pressure Test (2.5L & 4.0L)
Fuel Pump Pressure Test (5.9L)
Fuel System Rest Pressure (2.5L & 4.0L)
Capacity (Volume) Test (2.5L & 4.0L)
Capacity (Volume) Test (5.9L)
Fuel Pump Relay (2.5L & 4.0L)
Secondary Spark Check
Spark Test
Spark Plug & Coil Wire Resistance
Ignition Coil Resistance Test
Ignition Primary Check
Notes
2.5L & 4.0L Primary Ignition
5.9L Primary Ignition
Idle Speed & Ignition Timing Check
Summary