2022 Editions Archives - UnderhoodService
Plastic Timing Chain Guides

Timing chain guides are designed to wear, but the guides are designed to last the engine’s life.

Rough Running GM Vehicle

This condition may be caused by an internal circuit board fault within the throttle body.

Power Window Regulator and Motor Service

Power windows are great as long as they roll up and down when commanded to do so.

Hybrid Vehicle Fluid Maintenance

There are opportunities your shop can’t pass up just because the car or SUV has a hybrid badge on the back.

Why Alternators Are Subject To Ripple Voltage

The alternator produces an AC current that must be converted into DC current by way of a rectifier.

EV Opportunities

You are gaining and retaining many service opportunities with Evs.

Reflashing Power Supplies

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

OBDII Connectors

OBDII connectors serve as the main communication point between the technician and the vehicle.

Throttle-By-Wire Diagnostics

Throttle-by-wire systems proactively manage the air and fuel going into the combustion chamber.

Hyundai & Kia Hybrid Drivetrain

The Hyundai hybrid system has a motor control unit (MCU) and hybrid control unit (HCU).

Mode $06 Misfire Diagnosis

Understanding why ‘Mode $06’ was developed and how it works to identify misfires.

Valve Lifter Technology

Hydraulic lifters are precision-fit assemblies.