Diagnostics are the essential first step in A/C-system servicing. To get started you'll need an A/C manifold-gauge set, a thermometer, and a leak detector. The manifold gauges will allow you to ...

This month we will provide you with detailed troubleshooting diagnostics using the A/C-gauge set. This will help you to understand the role pressure plays in different parts of the system.

From cold weather to road debris, there are many reasons your car's tire pressure might be too low. Here's why you should have a gauge and know how to use it.

To find out if your exhaust system is blocked, you can measure the exhaust back pressure with a back pressure gauge. Generally, when idling, exhaust back pressure should not exceed 1-1/4 PSI.

Using dry nitrogen to pressure test a system is a very effective method of verifying a system is leak-free. In fact, I believe it is more reliable than using a standing vacuum test typically performed ...