Vehicles using CA18i engine list:

Engine CA18i

Symptoms:
- Rough idling and stalling
- Poor acceleration and reduced power
- Excessive oil consumption or smoke from exhaust
- Overheating or coolant leaks
- Hard starting, especially when cold

Diagnosis:
- Check for vacuum leaks causing rough idle and stalling
- Inspect ignition components (spark plugs, wires, distributor) for wear or damage
- Perform a compression test to assess cylinder health
- Examine the timing belt for wear or incorrect tension
- Inspect the cooling system for leaks or malfunctioning thermostat
- Check for clogged fuel injectors or fuel filter issues

Fixes:
- Replace worn spark plugs, ignition wires, or distributor cap and rotor as needed
- Repair or replace vacuum hoses to eliminate leaks
- Replace timing belt and tensioner if worn or overdue
- Clean or replace fuel injectors and fuel filter to restore fuel flow
- Repair coolant leaks, replace thermostat, and flush cooling system to prevent overheating
- Address oil leaks by replacing gaskets or seals; change oil regularly
- If compression is low, consider valve adjustments or engine rebuild depending on severity

Prevention:
- Follow regular maintenance schedule including timely oil and filter changes
- Replace timing belt every 60,000 to 90,000 km to avoid catastrophic failure
- Use quality spark plugs and ignition components to maintain efficient combustion
- Regularly inspect and replace worn vacuum hoses and coolant hoses
- Keep cooling system clean and topped up with correct coolant mixture
- Avoid prolonged idling and harsh driving to reduce engine stress

By adhering to these diagnostic steps and maintenance practices, owners of the Nissan Skyline GXi 1.8 with the CA18i engine can ensure reliable performance and longevity.