Injector Basics
This computer controls injector on-time, also called pulse width.
What is the PCM?
This must be worn any time fuel system work is performed.
What are safety glasses?
This injector condition commonly causes a lean misfire.
What is a clogged injector?
This tool is used to measure injector resistance.
What is a DVOM or multimeter?
What is a DVOM or multimeter?
This should always be done before replacing an injector.
What is testing or diagnosing?
Most fuel injectors are controlled on the ___ side of the circuit.
What is the ground side?
This step prevents fuel spray when disconnecting injectors.
What is relieving fuel pressure?
A leaking injector most often causes a ___ condition.
What is a rich condition?
This tool confirms the PCM is commanding the injector on.
What is a noid light?
Why visual inspection is always the first step.
What is it saves time and finds obvious faults?
Besides fuel amount, injectors must also deliver proper fuel ___.
What is spray pattern?
Why open flames are prohibited when testing injectors.
What is fire or explosion risk?
An injector with infinite resistance is considered what?
What is an open circuit?
This tool allows you to hear injector operation.
What is a mechanic’s stethoscope?
Which test proves the injector is receiving a command signal.
What is a noid light test?
The term that describes how long an injector stays open.
What is pulse width?
This should be disconnected before certain electrical injector tests.
What is the battery?
This injector fault can damage the PCM if ignored.
What is a shorted injector?
This test compares fuel pressure drop between injectors.
What is an injector balance test?
What is an injector balance test?
Why clicking alone is not proof of proper injector operation.
What is it doesn’t confirm fuel flow?
True or False: If an injector clicks, it is definitely flowing fuel correctly.
What is false?
On NOCTI, failing to follow fuel system safety procedures can result in what?
What is automatic point loss or task failure?
Which injector failure could cause poor MPG and rough idle?
What is a leaking injector?
Why comparing injector resistance readings is better than checking just one.
What is it helps identify abnormal injectors?
This professional habit separates a technician from a parts changer.
What is proper diagnosis?