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Interpreting Compression Tests–ASE Practice Questions (VIDEO)

Description Technician A has just completed a running compression test using a mechanical compression gauge. Technician B says that the test is used to check the volumetric efficiency of the engine. Technician A says that the higher-than-expected readings indicate a...

Do I Need a Tune-up?

If you’re like me, you might cringe a little. More often than not, they’re hoping this magical procedure will fix some mysterious issue with their car. But let’s break it down: what is a tune-up, anyway? Most dictionaries describe a tune-up as “a general adjustment to...

PSA: Be Safe With Brake Cleaner

If you work in a shop (and if you’re reading this, chances are you do), you are undoubtedly familiar with brake cleaner. And, if you know the scent of brake cleaner, you probably know that using it is not great for your health if it comes in contact with your skin,...

Compression Testing | ASE Practice Questions (VIDEO)

Description Technician A has just completed a dry compression test of a four-cylinder engine. All four cylinders are below specification by about the same amount. After performing a wet compression test, values remained unchanged. What could cause this condition? A)...

When a Voltmeter Isn’t Enough (Video)

Description With the variety of electronically controlled systems on a modern automobile, the days when a test light or simple voltmeter was enough to diagnose problems are long gone. Using a digital storage oscilloscope (DSO) can make troubleshooting faster and more...

P0420/P0430—The #1 DTC in the Country

DTCs (Diagnostic Trouble Codes) P0420 and P0430 are generic industry codes and part of the OBD-II standards. The descriptor labels the code(s) “Catalytic Converter Efficiency Below Threshold – Bank 1 (or 2)”. And the number one part sold to repair this problem is a...

Mastering the Numbers

Mastering the Numbers

by | May 15, 2025

Running an auto repair shop is about more than just fixing cars. While providing top-notch service is essential, managing a truly successful business also depends on understanding and acting on the financial barometers of the operation. One of the most important of...
Don’t Overlook This Step When Servicing Brakes (VIDEO)

Don’t Overlook This Step When Servicing Brakes (VIDEO)

by | May 13, 2025

Don’t Overlook This Step When Servicing Brakes (VIDEO) Description A brake service job isn’t complete unless the reservoir cap’s diaphragm has been pushed back into place. This simple step is easy to forget, but it helps to reduce brake fluid contamination and ensure...
“Can you drive a stick?”

“Can you drive a stick?”

by | Feb 27, 2025

Well, if you clicked on the title you have an answer to that question, I’m sure, and probably have an opinion on it. As the automatic transmission ascends to complete ubiquity, I would be curious to know what ratio of techs and writers in your shops can row their own...