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Home >> Mazda >> 1994 >> 929 >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Engine Controls - Specifications) >> Quick-Service >> Engine Compression
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Engine Compression

WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Warm engine to normal operating temperature. Remove all spark plugs. Disconnect ignition coil primary wire connector.
  2. Hold throttle plate fully open. Crank engine, and note compression pressure.
COMPRESSION RATIO

Application Specification
MX-6
2.0L 9.0:1
2.5L 9.2:1
626
2.0L 9.0:1
2.5L 9.2:1
COMPRESSION SPECIFICATIONS

Application Minimum psi (kg/cm2 ) @ RPM Standard psi (kg/cm2 ) @ RPM
2.0L 119 (8.4) @ 300 171 (12.0) @ 300
2.5L 142 (10.0) @ 250 203 (14.3) @ 250
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