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Shop Press

Shop Press is the news and idea hub for everything related to working on cars and trucks, focusing on repair, technology, and wrenching lifestyle.

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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...

Add or Delete These Simple Parts to Help Customers Save Money

Looking for an easy way to win over your customers that they’ll enjoy every time they drive? Look at their vehicles from a hypermiler’s perspective. In case you haven’t heard the term before, the hypermiling community is obsessed with optimizing their vehicles’ fuel...

Are You Properly Checking Hub Bearings For Wear? (VIDEO)

Description The old “grab the wheel and shake” test you may have used for tapered bearings doesn’t apply for the hub bearings found on most of today’s vehicles. Pete Meier explains how a dial indicator is necessary for a true wear check.Related Videos

Efficiency is the Name of the Game

Someone once told me that successful auto repair is a game of inches. But in our fast-paced, ever-evolving industry, inches are no longer accurate—we need to hit the bullseye every time. Margins are tighter, technology is advancing rapidly, and customer expectations...

Misfire Cause–ASE Practice Questions (VIDEO)

Description Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft...

Clean the #&@$ing snow off the roof of your car or truck

Clean the #&@$ing snow off the roof of your car or truck

by | Jan 31, 2023

As we are deep into winter here in the northern hemisphere, I believe it’s time for this seasonally appropriate rant: clean the #&@$ing snow off the roof of your car or truck. Look, I’ve been there. You’re running late for work after a big storm the night before,...
January Automotive Horoscopes

January Automotive Horoscopes

by | Jan 10, 2023

Aries: You may not think of some of your repairs as innovative, but a creative fix is a creative fix. Your outlook is out there, and that’s OK. Expect to see someone else cribbing your notes but remember to take it as flattery. Not everyone has the same gift of...
January Automotive Horoscopes

December Automotive Horoscopes

by | Dec 20, 2022

Aries: The shop has a somber attitude, so tone down the practical jokes on a friend. Stick close to home and get your chores done. Now is the time to to start thinking about spring tasks. Have you started seedlings for the garden yet? Restraint pays dividends this...