VIDEO: Understanding The Path Of Least Resistance

2022-07-15 19:10:41 By : Ms. Li Chen

Caring For AGM And Flooded Batteries

Ethanol Damage to Fuel Pumps

Forcing Vehicle Monitors For Calibration

Caring For AGM And Flooded Batteries

Ethanol Damage to Fuel Pumps

Forcing Vehicle Monitors For Calibration

Domestic Driveability Diagnostics & Tips

Sponsored By NGK Spark Plugs

Learn how to streamline the diagnostic process for driveability issues. This webinar will help you effectively communicate a vehicle diagnosis to the service advisor. The presentation will provide "real-world" data and cases studies.

This technical topic is geared for the average B+ technician and/or a refresher for the A technician. NGK is dedicated to meeting the learning needs of all skill levels.

Speakers Philip Austin, Technical Training Specialist, NGK Spark Plugs Andrew Markel, Director of Technical Content, ShopOwner

Sponsored By NGK Spark Plugs

The new issue of ShopOwner magazine is now available to read online or download at no charge to you!

TPMS sensor signals are low power and low frequency, with most sensors transmitting at 315MHz or 433MHz.

One of the problems with ethanol is how it reacts to water in the air and in the tank.

Underhood Service targets repair shops that derive 50 percent or more of their revenue from the service and repair of under-the-hood systems. The expanding amount of knowledge and capital needed to keep up with technological advances has led these shop owners to concentrate on underhood systems, while also offering preventive maintenance services on most major vehicle systems. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Underhood Service and the Underhood Service eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!

Underhood Service targets repair shops that derive 50 percent or more of their revenue from the service and repair of under-the-hood systems. The expanding amount of knowledge and capital needed to keep up with technological advances has led these shop owners to concentrate on underhood systems, while also offering preventive maintenance services on most major vehicle systems. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Underhood Service and the Underhood Service eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!

ByUnderhood Service Staff Writers on Jul 15, 2022

ByUnderhood Service Staff Writers on Jul 6, 2022

High underhood temps, increased power demands and vibration can damage alternators or starters. Sponsored by ACDelco.

Don’t settle for “almost” - it matters where the engine is manufactured or remanufactured. Sponsored by ACDelco.

Brake pads are thoroughly developed to produce the best result. This video is sponsored by ZF Aftermarket.

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The spark plug can have a yellow or orange band that is called a corona stain. This video is sponsored by Blue Streak.

Electricity will always want to go to ground through the path of least resistance. For ignition systems, this means that energy coming out of the secondary will want to create a spark outside the combustion chamber if a low resistance path is present. This video is sponsored by Blue Streak.

When the power from the secondary is traveling through the boot, ignition wire or spark plug, it creates static electricity that causes oil and dust in the area to stick to the component. You’ve probably seen this condition on spark plugs where the ceramic insulator is exposed on the side of a head. The spark plug can have a yellow or orange band that is called a corona stain. Some technicians mistake it for exhaust gases leaking between the shell and insulator. If enough material builds up on a boot or plug it can create a path of least resistance for the electricity generated by the secondary. This is also the same phenomenon that causes carbon tracking inside a distributor cap.

If the ignition coil is mounted in the head above the spark plug, the possibility of carbon tracking is reduced, but not entirely eliminated. If the valve cover gasket or spark plug tube seal is leaking, the oil and vapors could cause carbon tracking and other damage eventually. If the boot does not fully seal against the top of the tube and insulator of the spark plug, oil and dirt can find its way on to the plug and boot. This is why a very light coating of di-electric grease is recommended. However, too much di-electric grease can attract dirt and oil without the help of static electricity.

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Technical resources to help diagnose and repair engine-related service issues.