Nissan Z - ZX 1970-1988 Repair Guide



In order to extract the full measure of performance and economy from your engine, it is essential that it be properly tuned at regular intervals. A regular tune-up will keep your engine running smoothly and will prevent the annoying minor breakdowns and poor performance associated with an untuned engine.

All 1970-73 Z-cars use a conventional breaker points ignition system. These models equipped with an automatic transmission use a dual point system for emission control purposes. Those with a manual transmission have single breaker points. All 1974 and later models use a fully transistorized ignition system. The 1974 automatic transmission models and all 1975-76 49 States and Canadian models have dual pick-ups. The 1975-76 California models have only one pick-up. All 1977 and later models have single pick-up electronic ignition.

A complete tune-up should be performed every 12,000 miles (19,000 km) or twelve months, whichever comes first. This interval should be halved if the car is operated under severe conditions, such as trailer towing, prolonged idling, continual stop and start driving, or if starting and running problems are noticed. It is assumed that the routine maintenance described in General Information & Maintenance has been kept up, as this will have a decided effect on the results of a tune-up. All of the applicable steps of a tune-up should be followed in order, as the result is a cumulative one.

If the specifications on the tune-up sticker in the engine compartment of your vehicle disagree with the Tune-Up Specifications chart in this section, the figures on the sticker must be used. The sticker often reflects changes made during the production run.