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Compression pressure — maximum cylinder difference (NB2 and Mazdaspeed)
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Not yet checked against the factory manual for your car's year. It's verified in the 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture); later manuals may differ.
28 psi (196 kPa; 2.0 kgf/cm²) maximum difference between cylinders196 kPa {2.0 kgf/cm², 28 psi} maximum difference between cylinders
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Fully charged battery. Warm engine to normal operating temperature, stop and allow to cool about 10 min. Perform factory fuel-line safety procedure and leave fuel-pump relay removed, remove all spark plugs, and disconnect ignition-coil connector. Fully depress accelerator while cranking and record maximum gauge reading for every cylinder. Reference test speed 300 rpm. Standard pressures are listed separately for naturally aspirated NB2 and Mazdaspeed.
Applies to
- NB 2001–2005 (BP-Z3) — Other years inferred from 2005 factory evidence.
- NB 2004–2005 (BP-Z3-TURBO) — 2005 factory evidence; 2004 inferred within MSM family.
- Verified in: 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)
Sources (1)
View 1 source citations
- 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
Page Compression Inspection (PDF p. 639) · Printed value & notes
Page Compression Inspection (PDF p. 639)Printed: “Maximum difference between cylinders 196 kPa {2.0 kgf/cm², 28 psi}”
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