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.
Cylinder Compression Pressure
Ensure battery is fully charged and starter motor is in good operating condition. Engine should be at room temperature. Disconnect wiring from ignition module. Clean spark plug recesses with compressed air and remove spark plugs. Hold throttle valve in wide open position. For each cylinder, crank engine through 4 compression strokes. Record compression pressure from fourth revolution. Continue test for remaining cylinders. See ENGINE COMPRESSION SPECIFICATIONS table. Install and tighten spark plugs to 13 ft. lbs. (18 N.m).
| Application | Specification - psi (kPa) | ||||
|---|---|---|---|---|---|
| Normal Compression Pressure | (1) | ||||
| Minimum Compression Pressure | (1) | ||||
| Compression Variance | (2) | ||||
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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.