Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Engine Performance

NOTE: To provide best vehicle performance and lowest vehicle emissions, it is most important that the tune-up be done accurately. Use the specifications listed on the Vehicle Emission Control Information label found on the engine compartment hood.

1. Test cranking amperage draw.
2. Tighten the intake manifold bolts.
3. Perform cylinder compression test:
4. Clean or replace spark plugs as necessary. Adjust gap.
5. Test resistance of spark plug cables.
6. Inspect the primary wire. Test coil output voltage, primary and secondary resistance. Replace parts as necessary.
7. Set ignition timing to specifications.
8. Perform a combustion analysis.
9. Test fuel pump for pressure.
10. Inspect air filter element.
11. Inspect crankcase ventilation system.
12. Inspect and adjust accessory belt drives.
13. Road test vehicle as a final test.