RX7 2RTR- 1308cc 1.3L Turbo FI (1989)
Spark Plug: Testing and Inspection
Spark Plugs (Original Equipment NGK Plugs Shown)
1.
Inspect spark plugs for:
a. Incorrect gap.
b. Carbon deposits.
c. Cracked center electrode insulator.
d. Burned or worn electrodes.
e. Fouling.
2.
Burned or worn electrodes may result from:
a. Excessive mileage.
b. Lean fuel mixture.
c. Advanced ignition timing.
d. Loose plug.
e. Plug heat range too high.
f.
Insufficient engine cooling.
3.
Plug fouling may result from:
a. Rich fuel mixture.
b. Retarded ignition timing.
c. Excessive oil consumption.
d. Incorrect plug gap.
e. Plug heat range too low.
f.
Excessive idling / low speed running.
g. Clogged air filter element.
h. Faulty coil or ignition wires.
4.
When replacing plugs, adjust gap to 0.056 in (1.4 mm) and torque to 10 - 13 ftlb (12.7 - 17.7 Nm).
