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2005 Jetta 2.5L PCV/Vacuum Leak

a starting and idling anomaly that was repeated in the facility and had concerns in relation to idle quality.

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Audi Driveline and C-V Boots

The drivelines of modern Audi vehicles are integral components for propulsion. Without a way to properly transmit power from the engine to the wheels, you’re going nowhere!

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VW Haldex 4Motion Generation IV

2.0L TFSI Automatic Transmission AWD

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Getting to Know Mr. Mezger, Part 1

You may know his name, and may have encountered his work. But do you really know him?

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Porsche Oil Scavenging Systems

If the quantity of oil being burned is excessive it can quickly foul those new plugs. The result may not be just a misfire warning, but now possible catalytic converter efficiency codes and maybe lean mixture codes.

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2.0L VW TFSI Automatic Transmission 4Motion

Yes, this is only an experiment but why not test a VW ignition coil with a Mercedes-Benz or Kia wheel speed sensor?

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Audi Rear Main Seal/Oil Leaks

A poorly sealed engine will leak oil, which can create a multitude of issues. When oil leaks are left unchecked, damage to additional components sets in.

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2009 VW Tiguan Leaks and Heating Woes

2.0L TFSI Automatic Transmission AWD

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Out of the Box EVAP with a “Magic Wand”

An Evap code and a Check Engine light don’t have to be warnings of doom. You’ll find diagnosis and repair straightforward using a schematic and a little patience.

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The DVOM and Signatures

Gone are the days of using a DVOM to check on/off switches and the devices they control. There’s more information than you may think in the digital electronic signatures of today’s advanced on/off devices. Here’s what those numbers actually mean.

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derFix produces monthly digital content on how to diagnose and repair Volkswagen, Audi and Porsche vehicles. If you would like to receive the annual print issue (November), please be sure to update your profile with your preference for print (or print and digital). 

Porsche Oil Scavenging Systems

Porsche Oil Scavenging Systems

If the quantity of oil being burned is excessive it can quickly foul those new plugs. The result may not be just a misfire warning, but now possible catalytic converter efficiency codes and maybe lean mixture codes.

read more
Audi Rear Main Seal/Oil Leaks

Audi Rear Main Seal/Oil Leaks

A poorly sealed engine will leak oil, which can create a multitude of issues. When oil leaks are left unchecked, damage to additional components sets in.

read more
The DVOM and Signatures

The DVOM and Signatures

Gone are the days of using a DVOM to check on/off switches and the devices they control. There’s more information than you may think in the digital electronic signatures of today’s advanced on/off devices. Here’s what those numbers actually mean.

read more
An Inside Look at Porsche Transmissions

An Inside Look at Porsche Transmissions

The manual transmissions used in late-model Porsches are precision devices that provide excellent performance and service life. Here’s what you need to know when overhaul time comes around.

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