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Auto Service Professional

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June 2022

Volume: 12
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Spark Plug Tech

Interpreting Spark Plug Condition

The spark plug has a straightforward job to do. It’s responsible for igniting the air/fuel mixture in the engine’s combustion chamber initiating the power stroke. But this task is far from simple. The spark plug’s operating environment is extreme with combustion temperatures reaching 1500 F and peak cylinder pressure reaching 1,000 psi or more.


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Understanding Common TPMS Problems

Proper Identification, Inspection & Service Are Required

Tire pressure monitoring system (generally referred to as TPMS or TPM) is relatively basic in terms of the number of involved components. But there can be hiccups. We walk through the steps, and also gather service tips from TPMS manufacturers.


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Overview of a Modern Electronic Power Steering System

EPS Isn't New, But It Has More Capabilities

Electronic Power Steering (EPS) is now standard equipment on virtually all new models of vehicles sold. One reason is clear: it removes the parasitic drag of the constantly turning, belt-driven hydraulic pump used to supply the hydraulic force to move the steering mechanism.


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Diagnosing Intermittent Drivability Issues

Strategies for Detection and Repairs

We as automotive technicians all get the intermittent problems or symptoms from a customer’s car that we know can take a lot of diagnostic time to duplicate the symptom and a lot of diagnostic tests. Even so, there are times in all of our encounters when we are forced to make a judgment call as to what component we may feel is causing the intermittent problem.


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