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 MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 737 (CYLINDER HEAD)ENGINE COMPRESSION INSPECTION
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Engine Compression Inspection
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Engine Compression Inspection
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
After this inspection, you must reset the powertrain control module (PCM). Otherwise the PCM will continue to stop the injectors from functioning. Select PCM reset using the Honda Diagnostic System (HDS) (see
HDS CLEAR COMMAND
).
- Warm up the engine to normal operating temperature (cooling fan comes on).
- Turn the ignition switch to LOCK (0).
- Connect the HDS to the data link connector (DLC) (see step 2 HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ).
- Turn the ignition switch to ON (II).
- Make sure the HDS communicates with the vehicle and the PCM. If it done not, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
- Select PGM-FI, INSPECTION, then ALL INJECTORS STOP function on the HDS.
- Remove the four intake side ignition coils (see IGNITION COIL REPLACEMENT ).
- Remove the four intake side spark plugs.
- Attach the compression gauge to a spark plug hole.NOTE: Use a compression gauge with a connecting length (between the edge and the flange) of less than 23 mm (0.9 in).
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.