How do you disable the ignition system?
The best way to disable any ignition system is to unhook the primary circuit. This may be a simple as removing a fuse, or you can find the primary wires to the coil or coils and unplug them. All ignition coils have a primary and secondary circuit.
What is computer controlled ignition system?
This system consists of an electronic control assembly (ECA), seven monitoring sensors, a Dura Spark II ignition module and coil, a special distributor assembly, and an EGR system designed to operate on air pressure. The ECA is a solid-state microcomputer consisting of a processor and a calibration assembly.
What is the purpose of the ignition system?
The purpose of the ignition system is to create an electric spark in the engine combustion chamber, at exactly the right time, which will ignite the mixture of petrol and air.
What is the best way to turn off ignition system for a compression test?
Two technicians are discussing how best to turn off the ignition system for a compression test. Technician A says that it’s best to ground the coil wire after taking it off the distributor cap. [ But Technician B says that one should pull out the primary leads from the ignition coil.
How do electronic ignition systems work?
An electronic ignition system is a type of ignition system that works electronic circuits, usually by transistors. The transistors are controlled by sensors to generate electric pulses which then generate a high voltage spark that can burn the lean mixture and provide a better economy and lower emission.
How do you turn off fuel for compression test?
Re: Compression check: how to disable fuel injection?
- Run the engine until it reaches operating temp.
- Remove all spark plugs.
- Disconnect the relay for the fuel pump.
- Disconnect the hot lead to the ignition coil; it is the wire labeled #1.
What do you call a computer controlled ignition system?
In modern caras this is accomplished using computers. Every car built in the last 20 years or so has a central computer that tells when to make a spark. These are called distributorless ignition systems. But suffice to say that it’s all computerized these days.
How to diagnose an ignition system problem?
Ignition System Diagnosis Using Visual Inspection • Check all spark plug wires for proper routing. All plug wires should be in the factory wiring separator. • Check that all spark plug wires are securely attached to the spark plugs and to the distributor cap or ignition coil(s).
How does a classic car ignition system work?
Classic cars all had the same type of ignition system. An engine relies on spark to ignite the fuel that the carburetor sprays into the cylinder. It uses a spark plug to make this spark, something has to tell the spark plug when to fire and something else has to create enough electricity. In modern caras this is accomplished using computers.
What happens when you turn off the ignition?
When the vehicle’s ignition system triggering switch turns off the power to the ignition coil, the magnetic field collapses. As it does, the secondary winding captures the collapsing magnetic field from the primary winding and converts it into 15,000 to 25,000 volts.
Ignition System Diagnosis Using Visual Inspection • Check all spark plug wires for proper routing. All plug wires should be in the factory wiring separator. • Check that all spark plug wires are securely attached to the spark plugs and to the distributor cap or ignition coil(s).
When the vehicle’s ignition system triggering switch turns off the power to the ignition coil, the magnetic field collapses. As it does, the secondary winding captures the collapsing magnetic field from the primary winding and converts it into 15,000 to 25,000 volts.
When was the Lean Burn ignition system introduced?
Around 1978 the Lean Burn computer ignition system (LB) was introduced in an effort to control pollution and reduce tune-up frequency. The Lean Burn system was initially used on V-8 cars and trucks. After 1980, Lean Burn was a Slant 6 option and by 1983 it was used almost exclusively,…
How does a distributor less ignition system work?
This system improved the production of the spark by dedicating a coil for every 2 cylinders and generating a stronger spark. Another significant improvement to the ignition system came a few years later. This type of ignition system utilizes all the components found in the distributor-less system.