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Runners And Ports: How Modern Engines Manage Air

Variable-length intake runners change the length of the intake passages depending on engine speed and load.

Limited-Slip Differentials And Diagnostics

A limited-slip differential helps to control the tangential forces.

Engine Build: Turbocharged 6.0L Powerstroke

Benito Diaz and his shop, STP Diesel, specialize in Ford Powerstroke work.

VANOS Variable Valve Timing Diagnostics

The latest versions continuously adjust the position of the intake and exhaust camshafts for better power and more.

Turbo Tools: Boost Driveability, Diagnostics

The two most important parameters to look at are the desired boost pressure and actual boost pressure during a test drive.

Subaru Drivetrain Noise Diagnostics

To reduce noise, some Subaru driveshafts use a special constant velocity joint to connect the two pieces of the driveshaft.

Radio Waves And No-Start Diagnostics

When a vehicle starts today, the energizing of the starter is only one of many events.

New Snap-on Diagnostics European Coverage

Additions include increased coverage and updates to standard features.

Advanced Belt Noise Diagnostics

How can you identify these types of alternator pulleys? Find out in this article.

Fuel Pump Diagnostics: Using Scan Tools

With a scan tool, it’s possible to verify if the modules controlling the fuel pump are receiving the correct data like oil pressure, crank position and key ­position.