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HOMESERVICE MANUALSDODGE AND RAM1990DAKOTA LE, 2D PICKUP, 3.9 X, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTING - V6PRELIMINARY INSPECTIONS & ADJUSTMENTSMECHANICAL INSPECTIONCOMPRESSION
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, Automatic

Mechanical Inspection: Compression

1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, AutomaticSECTION Compression

Check engine mechanical condition using a compression gauge, vacuum gauge, or an engine analyzer capable of performing a relative compression test. See engine analyzer instruction manual for availability and description of relative compression feature.

CAUTION: Use a remote starter to crank engine during compression test; DO NOT use ignition switch. The fuel injectors on many fuel injected models are triggered during engine cranking. This could cause fire hazard, flooding, crankcase contamination, hydrostatic lock, or lubrication to be washed off of cylinder walls.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.