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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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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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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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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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ELECTRICAL INTERFERENCE: Diagnosing Radio Frequency Interference Symptoms

ELECTRICAL INTERFERENCE: Diagnosing Radio Frequency Interference Symptoms

March 30, 2022

Vehicles today incorporate a complex radio frequency system that controls many features such as Keyless Entry, Keyless Start/Stop, Remote Start and other electrical accessory components. Vehicle owners cherish these creature comforts as they eliminate the frustration of dealing with keys to control the same functions as the frequency-controlled devices. Often, they have a change of […]

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Silencing Engine Sounds: It May Be Impossible with Today’s Technology

Silencing Engine Sounds: It May Be Impossible with Today’s Technology

January 4, 2022

It is not uncommon to receive customer complaints involving noises that may resemble noisy valve lifters or bearing clearance related noises. Other sounds may include piston slap during cold starts lasting for a couple of minutes in cold temperatures. Some of these noises are a normal characteristic for the engine with no means of silencing […]

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