Injectors, Checking

Injectors, Checking

Engine is equipped with 2-spring injectors. Injection of the fuel quantity thereby occurs in 2 stages. These injectors are to be replaced if malfunctions occur as neither servicing nor pressure setting is possible.

Recommended special tools and equipment
- Injector test unit V.A.G 1322 with pressure line V.A.G 1322/2

Test requirement
- Pressure gauge switched on

Checking injection pressure

WARNING: When testing injectors, keep hands away from the fuel spray, because the fuel penetrates the skin at high pressure and can cause severe injuries.







- Connect injector to injector test unit.
- Slowly press the pump lever downward. Read out the injection spray pressure at beginning of injection spray. If injection spray pressure deviates from the specified value, replace the injectors.
Specified values: (Positive pressure)
New injectors: 220 ... 230 bar
Wear limit: 200 bar

Checking for proper seal
- Slowly press pump lever downward and maintain pressure at approx. 150 bar for 10 seconds. During this, no fuel should drip from injector opening.
- Replace the injector if it is leaking.