Dear Tom and Ray: I've been driving for more years than I care to say, but this is the first I've heard of something called a smoke test. Recently, I noticed a gas odor coming from somewhere around ...

Diagnostic leak detection technology — sometimes referred to in the field as smoke testing or using a smoke machine — is being used by the most advanced fleets as a surprising solution to otherwise ...

Q: I have a 2013 Hyundai Elantra with 84,624 miles. The dealer recently replaced the engine under warranty. When I picked up the completed car, the check-engine light came on within a couple of miles.

Q: Help! My car has a problem that causes the check engine light to be on all the time. My repair shop said it's caused by a leak somewhere around the fuel tank and they can't seem to find it. They ...

In this video, I’ll show you how to make your own smoke test machine to quickly and easily detect leaks. A smoke machine makes diagnosing vacuum leaks fast and hassle-free—watch now to see how it’s ...

Check engine lights are sometimes accompanied by noises, smells, and vibrations that can help diagnose the underlying issue. But sometimes, that annoying little light comes on with no other indication ...