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Checking fuel pressure regulator and holding pressure > < Check components

Leon Mk1

Checking injectors
Checking injectors
Checking spray pattern and for leaks
Special tools and workshop equipment required
t  Adapter-set -V.A.G 1594C-
t  Digital potentiometer -V.A.G 1630-
t  Measuring container
Test sequence
Pull 3 pin connector off ignition transformer.
   
–  Pull 4-pin connector -1- off coolant temperature sender -G62-.
–  Connect digital potentiometer -V.A.G 1630- using aux. cables from -V.A.G 1594C- to connector contacts 1+3 and set connected side to 15 kΩ.
–  Remove fuel rail complete with all injectors from intake manifold as follows (fuel hoses remain connected).
–  Pull connector off sender for intake manifold pressure and intake air temperature.
–  Pull vacuum hose off fuel pressure regulator.
  E24-0150
–  Hold a small container under the injector to be checked and pull connectors off all other injectors.
–  Operate starter, using a 2nd person. Injector must inject in two pulsating sprays.
–  Repeat check with other injectors ensuring that injector to be checked is only connected.
–  Switch off ignition and afterwards check injectors for leaks. Not more than 2 drops/min may leak.
  Note!
When installing the injectors ensure that the O-rings are not damaged.
  N24-0027

Checking fuel pressure regulator and holding pressure > < Check components