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Compressor Oil for R1234yf

Working on R-1234yf systems is not that different from the R-134a variety.

Inspecting Oil Filters

Cartridge oil filters are easy to inspect, but canister oil filters only give you a limited view.

Fuel Pumps and Cranking

Diagnosing the problem comes down to understanding what causes a loss of fuel pressure.

Auxiliary Coolant Pumps

Don’t be fooled into thinking that these pumps will go away with the surge in hybrid and electric vehicle production.

A/C Service Equipment: We’ve Got It Good These Days

The world of A/C service has changed over the years. New tools and equipment make the job easier than ever.

Acura High-Pressure Fuel Pump 

Follow the correct repair procedures for a high-pressure fuel pump that is making a chirp.

Fuel Systems – Direct Injection

The configuration of any GDI system will vary according to age and application.

Curing Intermittent And Chronic Fuel Pump Failures

The fuel pump may be one of the most misdiagnosed components on a vehicle.

Ethanol & Fuel Systems

Here’s what you need to know about ethanol and E15 fuels.

High-Pressure GDI Fuel Pumps

When solving a fuel pump issue, the scan tool is your best friend.

Fuel Tank Contamination

A number of things can cause a fuel filter to plug up.

Oxygen Sensors And Catalyst Efficiency

Newer air/fuel ratio or wide-band sensors can detect a wide range of fuel conditions.