Vehicle ignition system VW Transporter T4

Ignition system — general information
The ignition system of gasoline engines ignites the air-fuel mixture using a spark generated by the ignition coil. Ignition coil low voltage current (12V) converted into high...

Operation of the ignition system
The control unit provides ignition thanks to a reliably programmed characteristic field. With a characteristically controlled ignition system, the ignition timing depends on the...

Safety Precautions When Handling the Electronic Ignition System
In the electronic ignition system, the ignition voltage reaches 30 kV (kilovolt). Under adverse conditions, such as dampness in the engine compartment, voltage surges can break...

Ignition distributor — design description
Ignition distributor and high voltage transformer of 4-cylinder engine 1. High voltage wires; 2. High voltage transformer; 3. Interference suppressor plug, 0.6-1.4 kΩ; 4. Terminal...

Removal and installation of the distributor of ignition
Complete removal of the ignition distributor is only necessary for extensive repairs. Removing 1. Set crankshaft to TDC for cylinder 1. 2. Disconnect the high voltage wires from...

Checking the high voltage transformer
The high voltage transformer is located in the engine compartment on the left under the guard in front of the battery, the transformer includes an ignition coil, a shutdown device...

Hall sensor test
Checking for voltage 1. Disconnect Hall sensor plug (on the ignition distributor). 2. Connect a voltmeter to the outer contacts. 3. Turn on the ignition. 4. Required value: at...

Checking and adjusting the ignition timing
Checking and adjusting the ignition timing 1. Ignition distributor; 2. High voltage cable 1 cylinder; 3. Spark plug 1 cylinder; 4. Connecting the stroboscope with the battery; 5....

Spark plugs — general information
The spark plug consists of an insulator, a housing, a center electrode and a ground electrode. The mass electrode is tightly fixed in the insulator. The insulator is rigidly...

Installing spark plugs
Replace spark plugs only when the engine is cold or warm to the touch. Attention! If the spark plugs are unscrewed on a hot engine, the spark plug thread will shear off the...

Selection of spark plugs for gasoline engines
Engine Engine code Spark plug Distance between electrodes, mm VW/ AUDI BOSCH BERU CHAMPION 4 cylinder engine AAS 101000005AF W9DTC – N9BYC 0,7... 0,9 101 000007 AD 5 cylinder...

Diagnostics of malfunctions of system of ignition
Cause Elimination Method Engine starts poorly or does not start at all No ignition spark. Distributor cap damp, dirty Clean and dry the distributor cap and spray the inside with a...

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