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HOMESERVICE MANUALSGEO1995TRACKER BASE, 1.6 6, 4WD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGPRELIMINARY INSPECTION & ADJUSTMENTSMECHANICAL INSPECTIONCOMPRESSION
1995 Geo Tracker Base, 1.6 6, 4WD, Standard

Mechanical Inspection: Compression

1995 Geo Tracker Base, 1.6 6, 4WD, StandardSECTION Compression

Check engine mechanical condition using a compression gauge, vacuum gauge or an engine analyzer. See engine analyzer manual for specific instructions.

WARNING: DO NOT use ignition switch during compression tests on fuel injected vehicles. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate the engine's oiling system.
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
SFI 9.5:1
TBI 8.9:1
Compression Pressure (2)
Standard (1) 199 psi (14.0 kg/cm2 )
Limit (1) 170 psi (12.0 kg/cm2 )
(1) Max. variation between cylinders: 14.2 psi (.9 kg/cm2 ).
(2) Checked at 400 RPM.
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.