Nissan MAF Sensors: Overview, Operation, Service, Diagnostics & Performance

The Mass Air Flow (MAF) sensor provides critical data to the ECM for calculating cylinder air charge and engine load. In combination with other...

Audi 4.0T Turbo Design, Function, Diagnosis and Repair

We explain the design and function of these turbo systems as well as diagnosis and repair of turbo-related problems The evolution of power and...

Keep the BMW Computer-Controlled Intelligent Headlights On

Volvo interior electrical systems are based on a network with a number of modules. We will talk about different Volvo interior electrical systems, what they do, and how to diagnose them using VIDA. We’ll also discuss how to diagnose early models without VIDA.

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An Efficient Approach to Mercedes-Benz No-Starts

It turns over, but won’t fire. Spark, fuel, or compression? Get the answer quickly.

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Volvo 5 Cylinder Engine Valve Cover Sealing

The Volvo 5 cylinder engine has been the workhorse engine for many years, starting in 1993 with the 850 model in the U.S. The 850 went away in 1997 with the introduction of the S70 and V70 in 1998 and the XC70 in 1999.

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Parking lot ding? Your car knows and can tell you.

Mercedes me can notify the driver immediately when it detects a collision with their parked vehicle.

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BMW Fuel injector Theory, Operation, Diagnosis and Recalls

Piezo injectors aren’t just for diesels. Understanding new technology is the key to successful repairs.

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Stopping Mercedes-Benz Wiper Streaking and Skipping

Debris, contaminants, or an incorrect angle of contact with the glass can cause wiper blades to squeak, judder, and leave streaks. Here’s how to stop it all.

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BMW High Mileage Service

This article is intended for the young and learning technicians. This is also intended for us old folks that need another addition to our bag of tricks.

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Dealing With No Start Problems on Volvos, Part 1

Volvo is one of those brands that rarely sees the tow truck.

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When is a vacuum leak not a vacuum leak?

When it’s hiding in the EVAP system of a Porsche Cayenne.

A P0455 code points to an EVAP problem, but the EVAP system checks out OK with our smoke tester. And the purge valve checks out as well. So where could the problem lie?

Our derFix Super Sleuths unravel the mystery.

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