We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are under real engine conditions.

No smoke machine? No problem. Learn how to check for engine vacuum leaks using visual cues, soapy water, and DIY tricks to ...

Attach the jump starter’s red positive (+) cable to the positive (+) terminal on the battery and the black cable to an unpainted metal surface on the engine bay. Turn on the jump starter per the ...

Your car is basically a rolling computer network, and that little “check engine” light is the car begging you to read the ...

Brock Bowman, the sales manager at a tire retailer, informed me that the symbol is supposed to resemble a flat tire (OK…) and ...

For around $25, the Neoteck TS20D is a fully-featured, well-made, and decently accurate tool that will handle most multimeter-related tasks. It's small enough to drop into a pocket or toolbox, durable ...

There’s a push to require automakers to test with dummies modeled on female bodies, not just male ones, to improve data that can save lives.

I never thought that a $12 accessory could rival tools that cost much more. But this USB-C power meter delivers in profound ways.