RX7 2RTR-1308cc 1.3L MFI (1991)
Ignition Timing: Adjustments
NOTE: On this distributorless ignition (DLI) system, ignition coil discharge is bipolar -- one side is negative, the other positive. A timing light
designed to meet discharge from the negative terminal only will not light or will only light intermittently at the positive terminal. This condition is a
result of timing light design, not vehicle malfunction. Follow these steps to avoid misdiagnosis:
1.
Check that your timing light operates correctly when connected to either the positive or negative side of the DLI system. If it does not, do not use it
on this system.
2.
When purchasing a new timing light, determine whether or not it can be used on DLI systems.
NOTE: Before assuming that a timing light with inductive pick-up will not operate correctly with this system, unclip the pick-up, turn over and
reattach to spark plug wire. Again check timing light function. If the light now operates properly, pick-up polarity is now correct and the light may
be used. If light still does not flash correctly, do not use it with this system.
PREPARATION
Fig. 37 Test Connector
1.
Check engine condition (spark plugs, leaks in hoses, etc.).
2.
Turn all electrical loads "OFF."
3.
Warm engine to operating temperature.
4.
Ground test connector (Green: 1-pin) with a jumper wire.
ADJUSTMENT
Fig. 35 Timing Marks
1.
Connect tachometer and check idle speed for 750 ± 25 rpm.
2.
Connect timing light to high-tension lead of front leading side. Check that mark on pulley (yellow) aligns with indicator pin.
3.
Connect timing light to high-tension lead of front trailing side. Check that mark on pulley (red) aligns with indicator pin.
LEADING:
5° ± 1° ATDC (Yellow)
TRAILING:
