207k views
5 votes
Two technicians are discussing firing kV. Technician A says that over 30 kV may be an indicator of high resistance in the spark plugs or wires. Technician B says that normal kV should be around 8,000-15,000 volts. Who is correct?

1) A only
2) only
3) Both A and B
4) Neither A or B

User Vedmant
by
7.7k points

1 Answer

6 votes

Final answer:

Both Technician A, who mentions over 30 kV may indicate high resistance, and Technician B, who indicates normal kV should be 8,000-15,000 volts, are correct.

The actual required kV can fluctuate based on various factors, including the condition of the ignition system and environmental aspects.

Step-by-step explanation:

Technician A states that over 30 kV may be indicative of high resistance in spark plugs or wires, which is a reasonable assertion because spark plug or wire resistance can contribute to higher voltage requirements for the spark to jump the gap.

However, Technician B's claim that normal kV should be around 8,000-15,000 volts could vary depending on the ignition system, but it generally falls within an acceptable range for many vehicles. Therefore, the correct answer would be that both Technician A and B are correct in certain contexts.

It's important to note that the firing voltage required to initiate a spark can vary for different engine types and conditions. An increased firing kV can be due to various factors such as high resistance in the ignition components or larger gap distances.

Normal firing kV ranges given by Technician B are typical for conventional ignition systems, and these tend to be lower in properly functioning components without excess resistance. However, actual kV requirements can fluctuate based on engine design, environmental conditions, and the state of the ignition components.

User Keith Yong
by
8.0k points