Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA2006B4000 BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE SYMPTOM TROUBLESHOOTING - (4 OF 5)ENGINE COMPONENT TESTCOMPRESSION TEST
2006 Mazda B4000 Base, Automatic
Compression Test
2006 Mazda B4000 Base, AutomaticSECTION Compression Test
- Make sure oil in crankcase is of the correct viscosity and at the proper level and that the battery is properly charged. Operate the vehicle until the engine is at normal operating temperature. Turn the ignition switch to the OFF position, then remove the spark plugs. See SPARK PLUG REMOVAL / INSTALLATION .
- Place the transmission in P (Park) (A/T) or N (Neutral) (M/T) and apply the parking brake.
- Block throttle plate in the wide-open position.
- Install a compression gauge in the No. 1 cylinder spark plug hole.
- Install a remote starter switch in the starting circuit. With the ignition switch in the OFF position, and using the remote starter switch, crank the engine a minimum of five compression strokes and record the highest reading. Note the approximate number of compression strokes required to obtain the highest reading.
- Repeat the test on each cylinder, cranking the engine approximately the same number of compression strokes.
RENDER: 1.0x
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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.