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e Acceleration Test (for distributor ignition systems)
1.
5.
Attach Pickup clamp
Ground Tester
Connect Ground Clamp (black) to a good vehicle ground or the battery's
negative terminal.
Turn tester ON
Press the ON/OFF button. If the tester does turn on make sure it has a
good 9V battery.
Select Distributor or DIS
Select P=DISTRIB. for testing on vehicles with distributors and press
T=DIS for distributorless vehicles,
Start engine
Start engine and let idle. Allow engine to warm-up and the idle to stabilize
before monitoring and recording readings.
Set tester to Peak Kv measurements
Press the P button. The tester will display peak secondary ignition voltage
measurement on the LCD.
Take Firing Voltage reading
Take Kv reading from the LCD (real time reading).
Take Acceleration Firing Voltage reading
While observing the Kv reading (real time), quickly increase the engine's
speed (snap the throttle) and allow engine to return to idle. The Kv reading
should increase from about 30 to 50 percent during increased engine speed.
Hf the Kv did not increase the proper amount see the Table 4.
Example: An idle reading of 15Kv. 15Kv x 1.3 (80%) =
have increased to about 19.5 to 22.5 Kv.
Kv reading
change HIGH
+ Worn spark plug
+ Resistor spark plug bad
+ Wide plug gap
» Fuel mixture lean
+ Misaligned or worn distributor cap
* Spark plug wire conductor has a break in it
Table 4
12
e Load Test
Observing firing voltages while the engine is under load can also help you find
several problems in the secondary of the ignition system. A properly functioning
ignition system's firing voltage will increase about 30 to 50 percent, when
sufficiently loaded.
WARNING:
Observe all vehicle manufacturer's safety practices and precau-
tions for catalytic converter protection when testing a ignition
system under load.
1. Attach Pickup clamp
Connect the Pickup Clamp (blue) to the first plug wire near the spark plug.
To ensure accurate readings keep clamp at least 1-2 inches from other
ignition cables and metallic engine parts.
2.
Ground Tester
Connect Ground Clamp (black) to a good vehicle ground or the battery's
negative terminal.
3. Turn tester ON
Press the ON/OFF button. If the tester does turn on make sure it has a
good 9V battery.
4.
Select Distributor or DiS
Select P=DISTRIB. for testing on vehicles with distributors and press
T=DIS for distributorless vehicles.
5.
Start engine
Start engine and let idle. Allow engine to warm-up and the idle to stabilize
before monitoring and recording readings.
6.
Set tester to Peak Kv measurements
Press the P button. The tester will display peak secondary ignition voltage
measurement on the LCD.
7.
Take Firing Voltage reading
Take Kv reading from the LCD (real time reading).
8.
Take Firing Voltage Reading Under Load
Place the engine under load condition while observing the Kv reading. The
Kv reading should increase 30 to 50 percent during increased engine load.
If the Kv did not increase the proper amount see Table 4 (on page 12).
Example: An idle reading of 15 Kv. 15 Kv x 1.3 (30%) = 19.5Kv
15 Kv x 1.5 (60%) = 22.5Kv. The Kv reading should have in-
creased to about 19.5 to 22.5 Kv.
13
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