Which of the Following is Least Likely to Cause a Weak Spark?

Which of the Following is Least Likely to Cause a Weak Spark?

Make sure to read the question and answers carefully before selecting an answer. This video is sponsored by Autolite.

One type of question asked on many ASE tests is a question that asks which of the following is least likely to be the cause of a problem or symptom. In other words, all of the answers are possible, but it is up to you to decide which answer is the least likely to be correct. Make sure to read the question and answers carefully before selecting an answer. Let’s try one of those questions now.

Which is the least likely to cause a weak spark at the spark plug?

A: A partially shorted primary winding in the ignition coil

B: A high-resistance spark plug wire(s)

C: A 12.2-volt battery voltage

D: A voltage drop across the ignition switch

The correct answer is C. The least likely cause of a weak spark is a battery voltage of 12.2 Volts. Even though the battery voltage is less than normal, it should be enough to allow the ignition coil (s) to become fully saturated and provide the correct spark to the spark plugs. Answer A is not correct because a partially shorted primary winding of the ignition coil could cause a weak spark and the question asks for which is the least likely to cause a weak spark. Answer B is not correct because a spark plug wire with high resistance could cause a weak spark. Answer D is not correct because a voltage drop across the ignition switch would reduce the current flow to the coil which could cause a weak spark.

This video is sponsored by Autolite.

You May Also Like

Understanding and Preventing Brake Noise

Silence brake noise – do the whole job right. This video is part of the Group Training Academy.

Do you want to make your customers happy? Eliminate their brake noise. Of all the things that will draw unwanted attention to their car, squeaks, groans or chirps when they step on the brake pedal will likely be high on the list of what brings them into your shop.

2 Wheels 2 Ways Ep. 3

Patrick and Jacqui visit Born Free, talk technicians, see inside a Dallas-area dealership, and get a lesson on suspension.

Vacuum Pumps and Parking Brake Actuators

As the car parc evolves, so do service opportunities. This video is sponsored by Standard.

Gasoline Direct Injection Technology

Gasoline Direct Injection technology has been a key part of improving fuel economy and reducing emissions since the early 2000s. This video is sponsored by Standard.

Software Focus: Efficient Diagnostics

Discover how to quickly retrieve codes, access exclusive repair information, and develop a strategic plan for optimal diagnostic results. This video is sponsored by Bosch.

Other Posts

Five Spark Plug Service And Replacement Tips

Most articles will tell you to use a torque wrench, but they never explain why.

Clutch System Components

By adopting a systematic approach and utilizing quality kits, the longevity and efficiency of the timing system can be maximized, ensuring a smoother-running engine. This video is sponsored by The Group Training Academy.

Timing Components

By adopting a systematic approach and utilizing quality kits, the longevity and efficiency of the timing system can be maximized, ensuring a smoother-running engine. This video is sponsored by The Group Training Academy.

Wheel Bearings Components

Follow along to learn what you may encounter when dealing with a Gen 1 wheel bearing. This video is sponsored by The Group Training Academy.