Hi,
If the PCV is good and all the mentioned things we discusses, the lights are off, and no leaks have been found, Based on the mileage, you may have low compression on all or one cylinder.
First, take a look through this link:
https://www.2carpros.com/articles/symptoms-of-low-compression
Here is a link that shows in general how compression is tested.
https://www.2carpros.com/articles/how-to-test-engine-compression
Here are the directions specific to your vehicle:
_____________________________________________
2002 Honda Civic DX Sedan L4-1668cc 1.7L SOHC MFI
Component Tests and General Diagnostics
Vehicle Powertrain Management Tune-up and Engine Performance Checks Compression Check Testing and Inspection Component Tests and General Diagnostics
COMPONENT TESTS AND GENERAL DIAGNOSTICS
Engine Compression Inspection
1. Warm up the engine to normal operating temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Remove the air cleaner housing.
4. Disconnect all four injector connectors.
5. Remove the four ignition coils.
6. Remove the four spark plugs.
pic 1
7. Attach the compression gauge to the spark plug hole.
8. Connect a tachometer.
9. Open the throttle fully, then crank the engine with the starter motor and measure the compression.
Compression Pressure:
Above 930 kPa (9.5 kgf/cm2, 135 psi)
10. Measure the compression on the remaining cylinders.
Maximum variation:
Within 200 kPa (2.0 kgf/cm2, 28 psi)
11. If the compression is not within specifications, check the following items, then re-measure the compression.
Damaged or worn valves and seats
Damaged cylinder head gasket
Damaged or worn piston rings
Damaged or worn piston and cylinder bore
_______________________________
Check this and let us know what you find.
Take care,
Joe
Image (Click to make bigger)
Friday, January 15th, 2021 AT 2:45 AM