IGNITION SYSTEM
Article Text (p. 3)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 03:31PM
Fig. 3.
2) To adjust trailing timing, loosen the screws securing the
trailing vacuum unit. Move the vacuum unit outward (to advance) or
inward (to retard). Retighten screws when correct timing is obtained.
Fig. 3: Adjusting Ignition Timing
Distributor position determines leading time. Vacuum unit position
adjusts trailing timing.
TESTING
HIGH TENSION WIRE RESISTANCE CHECK
Turn ignition switch "OFF". Connect ohmmeter leads to each
end of coil-to-distributor high tension wire. Resistance should not
exceed 16,000 ohms (plus or minus 400 ohms) per 39.37" (1 m).
IGNITION COIL RESISTANCE CHECK
Set an ohmmeter in the low scale. With ignition switch
turned "OFF", and coil wires disconnected, attach ohmmeter leads to
primary terminals of leading coil and then trailing coil. Primary
resistance should be 1.22-1.48 ohms for each ignition coil.
PICK-UP COIL RESISTANCE CHECK
1) Set an ohmmeter in the x100 scale. Turn ignition switch
"OFF". Disconnect connector between ignitor and distributor. See
Fig. 4.
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