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1983 Mazda RX-7 GSL Tune-Up Spark Plugs

1983 Mazda RX-7 GSLTESTING

TESTING

ENGINE COMPRESSION

The manufacturer recommends using a special compression tester (49 0820 280K). Compression testers for piston engines will read only the highest pressure of the 3 combustion chambers in the rotor housing.

HIGH TENSION WIRE RESISTANCE

Carefully remove high tension wires from spark plugs and distributor cap. Using an ohmmeter, measure resistance of wires while gently twisting wires. If resistance is not to specifications, or fluctuates from infinity to any value, replace high tension wire(s).High Tension Wire Routing

For high tension wire routing, see Fig. 2 and Fig. 3 .

ADJUSTMENTS

DISTRIBUTOR

All models are equipped with Mitsubishi electronic ignition with 2 pick-up coils. Air gap is non-adjustable.

IGNITION TIMING

1. Warm engine to normal operating temperature. Connect a tachometer, then connect timing light to leading (lower) spark plug of front rotor. Start engine and run at idle speed.

2. Check ignition timing and rotate distributor to correct if necessary. Tighten distributor lock nut and recheck timing. Download File PDF

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