Triggered Tests

Exhaust - Triggered Engine Cranking Test

Exhaust - Triggered Engine Idling Test

Inlet Manifold Vacuum - Triggered Engine Cranking Test

Regulator Vacuum - Triggered Engine Idling Test

A triggered test allows you to find cylinder specific information by triggering off a repeatable signal generated by the engine. Ignition scope triggering can be accomplished in different ways including ignition triggering (most common), current ramping using a low current probe and an injector or coil signal. For the tests described in these help pages the trigger will be obtained from the firing provided by cylinder number 1 using a secondary ignition pick up lead.

It is mandatory that all engine ignition issues are first resolved before running a triggered test. This is because defective or improperly functioning ignition systems can cause trigger problems and potential misdiagnosis. Once all ignition functions are properly resolved, triggered testing can provide highly useful information.

Note: All tests can be run without a trigger to determine if any engine or fuel related problems exist. However this method does not give cylinder specific information.