ignition coils design

Current Ramp Testing Ignition Coils with an Oscilloscope

The role of the ignition coil is to multiply battery voltage into high voltage. Following Ohm’s law for the conversion of volts to amperes, oil-filled coils generally require 3 to 5 amperes of primary current to produce 20,000-30,000 volts of secondary current. Modern E-core and COP (coil-over-plug) ignitions require as much as 7 amperes of…

intake manifold gasket

Intake Manifold Gasket Diagnosis

When servicing high-mileage engines, pay close attention to the condition of the sealing surfaces as this could affect the intake manifold gaskets.


Hybrid Fluid Maintenance Tips

With more than 3 million hybrids on the road, servicing hybrid ­vehicles and hybrid fluid maintenance is in your future.

cartridge-style wheel bearings

Cartridge-Style Wheel Bearing Survive Technique

More vehicles are being equipped with cartridge-style wheel bearings, a style that requires more labor to replace when compared to traditional bearings.

Fuel system

Clean Fuel Tanks Are Important

Fuel pump replacement comebacks can be costly and can hurt your reputation. Learn why and how to keep a clean fuel tank by following these steps.

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