Page 258 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Ignition Switch Failures: Issues with the ignition switch can prevent the car from starting, cause electrical problems,
or even lead to sudden stalling during operation.
Distributor and Coil Problems: Failures in the distributor cap or ignition coil can disrupt the electrical flow, leading
to misfires or a complete failure to ignite the engine
Identifying and addressing these common problems is crucial for maintaining your vehicle’s health and performance.

Reasons Behind Ignition System Problems
Ignition system issues can arise due to a variety of factors
Wear and Tear: Over time, components like spark plugs, wires, and distributors can degrade, impacting their
functionality.
Electrical Faults: Loose connections, corroded terminals, or faulty wiring can lead to inconsistent power delivery
and ignition failures.

External Factors: Exposure to extreme conditions, such as moisture, heat, or oil and dirt build-up, can also
compromise component integrity and function.
Symptoms of a faulty ignition system

Recognizing the signs of ignition system trouble can help prevent more significant issues
1 Difficulty in Starting the Vehicle: This is often the first indicator of an ignition system problem, where the car
struggles or fails to start.
2 Engine Misfires and Stalling: These symptoms can point to issues with spark plug firing or electrical
connections within the ignition system.
3 Inconsistent Engine Performance: Experiencing fluctuations in power or unusual noises during operation
can be linked to ignition system faults.
4 Decreased Fuel Efficiency: An inefficient ignition system can lead to poor fuel combustion, resulting in
reduced mileage.
Ignition switch problems how to fix them
Normally, a car engine should start in a single key turn.
1 Key won’t turn
This issue can be encountered in older or modern cars. Sometimes the key won’t move in the ignition switch. Old
and worn-out keys are generally responsible for this problem.
2 Key breaks inside ignition
A broken key inside the ignition switch is a common issue. Generally, old and worn-out keys can’t resist the
pressure exerted and break inside the switch. It left the ignition unusable and hence requires an immediate
solution.

245
CITS : Automotive - Mechanic Diesel - Lesson 76 - 79