To quickly check Fuel Injection we recommend the following:

HOOKUP:

• Connect the Black ground scope lead to a good vehicle ground.

• Connect the Red CH1 scope lead to the fuel injector wire that returns to the PCM.

SCOPE SETTINGS:

• Position waveform to lower portion of screen. This will allow best observation of the injector spike when injector is turned off.

• If spike is abnormally high (compared to a known good injector) the injector may be internally shorted drawing excessive current.

• An abnormally low spike implies high resistance in the injector or the circuit supplying it.

• Suspected resistance problems can be tested with precision using a Low Amp Clamp with a Labscope.