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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...

Troubleshooting Fuel Trim–ASE Practice Questions (VIDEO)

Description Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says...

Tire techs: Elevate your work with this one humble task

Tire techs: Elevate your work with this one humble task

I have mounted and balanced many tires. I have also sold many tires, and there was a step I took when I was installing them that I insisted all techs did when I eventually began writing service. I’m going to share it here, and while I can’t insist upon anything from...
Transfer cases: how to talk to your customers

Transfer cases: how to talk to your customers

The transfer case is an essential part of the part-time four-wheel drive system found on many traditional vehicles like SUVs and pickup trucks. The customers you help at your service counter may well rely on vehicles with 4WD daily and understand the systems well. But...
Bitten by a misfire

Bitten by a misfire

There are hundreds of great automotive technical schools around the country and they teach all the book lessons you need to know to start in this business. But nothing teaches better than real world experience. I consider myself a pretty good tech today and I got that...
Pulse width modulation and automotive lighting

Pulse width modulation and automotive lighting

I recently was talking to someone about how complex modern systems have gotten, and realized my unwilling conversational victim wasn’t sure why things had gotten so complex and if that was a good thing or not. “Even the lights are difficult!” the exasperated fella...
Another specialty punch

Another specialty punch

Disclaimer: I purchased these tools at full retail price at my own expense, with no compensation to write about the items. If you read Shop Press regularly, you may be thinking, man, those guys really love punches. You wouldn’t be wrong. We’ve written about big huge...