2020 Editions Archives - Page 3 of 10 - UnderhoodService
Staying Current

The wide variety of relay configurations, applications and uses can make selection difficult.

Diagnosing Crankshaft Position Sensors

Modern engines need to not only know the position of the crankshaft, but the position of the camshafts.

Belt Alignment Measurement

The first point of inspection is the belt. Listen for the most common noise: a chirping noise.

Gapping Spark Plugs

For modern fine-wire spark plugs, you should not measure the gap unless instructed by the manufacturer.

Be Careful When Replacing That Diesel Air Filter

Diesel engines have a certain level of differential pressure that needs to be maintained.

The Spin On Spun Bearings

A spun bearing is usually the end result of a chain of unfortunate events.

Turbo Tech: Smaller Engines Offer Diagnostic Opportunities

Many vehicle owners may not even know if their car or truck is turbocharged.

Reading Oil Product Datasheets

The product data sheet starts with a listing of the basics, like appearance and part numbers.

Diagnostic Strategies For Variable Valve Timing Systems

Here are seven diagnostic strategies that can be applied to any vehicle with variable valve timing problems.

Scan Tool Triage

New scan tools can bridge the divide between a basic scan and high end scan tool.

Nissan Tech Tip: Vehicle Key Not Detected

Nissan keys use radio frequencies (RF) similar to other everyday wireless devices.

Reflashing Power Supplies

A power supply to keep the system voltage consistent is a required piece of equipment to perform a reflash procedure.