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Diagnostic Challenges That Can Elude an Experienced Technician

Diagnostic Challenges That Can Elude an Experienced Technician

January 9, 2024

Vehicles today incorporate a maze of electronic components that must be considered when troubleshooting a performance related symptom. A vast arsenal of test equipment is necessary to communicate with the electronic systems and components. Systems are so connected that it is difficult for the technician to distinguish between a mechanical, electrical, fuel or emission related […]

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Oil Consumption: It May Be a Normal Characteristic

Oil Consumption: It May Be a Normal Characteristic

September 12, 2023

When dealing with oil consumption complaints, how much should be considered as too excessive? Is the engine consuming an excessive amount of oil or should the amount consumed be considered a normal characteristic? This is especially a concern with the extended service intervals, which may result in the vehicle being driven twice the mileage when […]

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TURBOCHARGED ENGINES: Are You Recommending the Required Services?

TURBOCHARGED ENGINES: Are You Recommending the Required Services?

July 20, 2023

Turbocharged engines are becoming commonplace as the vehicle manufacturers are utilizing smaller displacement engines fitted with turbochargers. Turbochargers and direct fuel injection can make a smaller displacement engine behave like a larger displacement engine, while accomplishing better fuel economy. With this technology comes some challenges, especially in the area of required maintenance. Failure to provide […]

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TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

May 5, 2023

GM TRANSFER CASE NOISES Customer complaints involving howling, whining, shudder or grinding noises during parking lot maneuvers in Auto Mode or highway speeds in 4HI or Auto may occur on four wheel drive GM trucks and SUV vehicles. Vehicles affected range from 2014–2023 year models. Specific applications can be identified in GM Service Bulletin 19-NA-136. […]

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Normal vs. Severe Service Selecting the Proper Lube Service Interval

Normal vs. Severe Service Selecting the Proper Lube Service Interval

February 28, 2023

Scheduled vehicle maintenance makes good business sense, especially when compared to costly engine repairs or an engine replacement. Many vehicle owners unknowingly select a service interval that is not healthy for the engine or recommended by the vehicle manufacturer. Most vehicle manufacturers offer two service schedules…Normal and Severe Service. These options have created much controversy […]

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DIAGNOSING PERFORMANCE COMPLAINTS: The Process Can Be a Challenging Event

DIAGNOSING PERFORMANCE COMPLAINTS: The Process Can Be a Challenging Event

February 16, 2023

Troubleshooting today’s technology can be challenging for even the most experienced technician. Making an accurate diagnosis, rather than throwing a lot of expensive parts and labor at the symptom can be a challenge. How would your shop handle the following customer complaints? a) Crank but no-start b) Hard starts c) Long crank time d) Misfire […]

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New Technology Poses New Challenges: Today’s Technicians Must Be on Their Best Game

New Technology Poses New Challenges: Today’s Technicians Must Be on Their Best Game

February 3, 2023

When I started my career as a technician, performance-related diagnostics were not that challenging when compared to today’s technology. Most symptoms could be isolated to a fuel or ignition-related problem with a simple road test. Diagnostic equipment was limited to some basic tools such as a timing light, rpm/dwell meter, compression gauge, vacuum gauge, volt/ohm meter, […]

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Servicing Diesels Lack of Maintenance Promotes Costly Repairs

Servicing Diesels Lack of Maintenance Promotes Costly Repairs

December 30, 2022

Failure to provide timely maintenance on a turbo-charged diesel engine can result in some expensive repairs, especially if it involves replacing a turbocharger or engine. The inexperienced may not realize how important some of the basic services are when servicing these applications. The turbo-diesel engines require a greater volume of air compared to a normal […]

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Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

October 20, 2022

Neglecting maintenance intervals can result in performance issues and internal engine damage due to sludge deposits restricting the flow of lubricant to vital engine components. Evidence of lack of maintenance will normally show up in the oil filter and related housing. The filter media will be impacted with sludge deposits. Where applicable, the filter cap […]

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SERVICING DIESELS: Identifying Normal Characteristics

SERVICING DIESELS: Identifying Normal Characteristics

September 20, 2022

A major part of the diagnostic process is identifying an issue from a normal characteristic. Following are some examples of customer complaints that could be mistaken as a problem when they may be a normal occurrence for the application. DIESEL ENGINES AND NOISE-RELATED SYMPTOMS Customer complaints of ticking, clicking, or cycling noises on 2017–2022 GM […]

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