Actron Sunpro CP7673 - Distributor Mechanical Wear Test; Idle Speed Test

3. DISTRIBUTOR MECHANICAL WEAR TEST = =
OHM e
HIGH} amp &
VOLTS & we
tow | SWELL iy
RPM
A. Turn the test selector to the DWELL position.
B. Connect the RED test clip to the distributor (—) side of the ignition coil and the
BLACK test clip to ground.
C. Start the engine-and let it idle. Observe the proper DWELL scale (4-, 6-, or 8-
cyl.) for your vehicle.
D. Race engine and observe difference in reading from idle.
RESULTS: CHANGE WITHIN 10% — Normal.
CHANGE OVER 10% — Worn out distributor. REPLACE.
NOTE: Some distributors have off-center pivoting breaker plates, which will
cause excessive dwell change. This is normal for this type of distributor.
See your owner's manual.
4. IDLE SPEED TEST
VOLTS m
OWELL %, Jf
Low O°
RPM
A. Turn the test selector to the RPM position and put the range switch in the LOW
position.
B. Place the 2/4 CYCLE switch in the proper position for your vehicle (consult
. your service manual if needed).
C. Connect the RED test clip to distributor (—) side of the ignition coil and the
BLACK test clip to ground.
D. Clip the inductive pickup lead to spark plug wire (with the arrow on the pickup
pointing towards the spark plug.).
E. Start engine and let idle. On automatic transmission vehicles, place shift
selector in correct position as specified by manufacturer for the idle speed test.
F. Observe the LOW RPM scale.
NOTE: Consult your owner's manual for correct idle speed.
RESULTS: HIGH — Speed adjusted too fast. ADJUST.
NORMAL — Speed adjusted correcily.
TOO LOW — Speed adjusted too slow. ADJUST.
CAUTION: Place shift selector in Neutral or Park when finished with test.