Underhood Automotive
Engine Build: Jesse James’ 427 cid Ultra4 LS Engine

This 427 cid Ultra4 LS engine was built for the owner of West Coast Choppers.

Audi Stop/Start Systems

Audi first equipped some models with stop/start systems as a standard feature in 2013.

Audi Wire Harness X-Ray

The 2018 Audi A8 is a mild-hybrid technology vehicle, with a belt alternator starter (BAS) and a lithium-ion battery.

Engine Build: Chevy SB2 Engine

Find out what went into this Chevy SB2 engine build!

Engine Build: 427 cid LSX Pro Touring Engine

Baier’s Engine Service built this 427 cid LSX for a Pro Touring application. Find out what makes it special!

Transfer Case: Two For The Price Of One

There are two models of the 4417, which can be an issue in diagnostics and obtaining parts or reman units.

VANOS Variable Valve Timing Diagnostics

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

Programming Keys, Codes And Diagnostics

You might think that key programming is a job for a locksmith or specialist, but the market is changing.

Engine Build: 390 cid Ford FE Engine

Find out what went into this 390 cid Ford FE Engine build!

Engine Build: Naturally Aspirated Subaru EJ Engine

This Subaru EJ engine was built for an Impreza RS2.5 coupe. Find out what went into the build.

Understanding The Function Of Serial Data Buses

Serial data buses help to eliminate multiple sensors and wiring.

Voltage Drop Testing Is The One Meter Test That Doesn’t Lie

The measurement of voltage is like the speed of highway traffic – when loads are light, the voltage does not drop.