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1990
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Wrangler Base, 2.5 E
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Engine Controls - Basic Testing
Engine Controls - Basic Testing
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Introduction
Visual Inspection
Mechanical Inspection
Compression
Exhaust System BACKPRESSURE
Fuel Pressure
Notes
Fuel Pressure Release (4.0L PFI)
Fuel System Pressure Test (2.5L)
Fuel System Pressure Test (4.0L)
Fuel Pump Pressure Test (4.2L & 5.9L)
Capacity (Volume) Test (4.2L & 5.9L)
Testing Spark At Coil
Spark Plug & Coil Wire Resistance
Failure To Start Test
Notes
2.5L & 4.0L
4.2L & 5.9L
Ignition Coil Cranking Test (4.2L & 5.9L)
Ignition Coil Resistance Test (4.2L & 5.9L)
Idle Speed & Ignition Timing
Notes
Idle Rpm Test
Summary