Volkswagen Workshop Service and Repair Manuals > Golf Mk5 > Power unit | 4-cylinder injection engine (1.6 l roller rocker finger) | Mixture preparation system, electronic inj.,Gas | Checking components | Checking injectors for leaks and quantity injected | Checking injection quantity, engine codes BSE, BSF, CCSA, CMXA

Checking injection quantity, engine codes BSE, BSF, CCSA, CMXA

l	The fuel pressure must be in order, checking → Chapter.

l	Intake manifold lower part removed.

l	Injectors installed in fuel rail and fuel line connected.

–	Insert injector to be checked into measuring beaker from injection rate tester -V.A.G 1602-.

–	Remove seat bench (Golf Plus: rear right seat) → General body repairs, interior; Rep. Gr.72.

–	Remove cover from fuel pump unit.

–	First check that the connector -arrow- is fitted securely by pulling the connector without pressing the catch. The connector can cause a fault if it has not been fitted correctly.

–	Now pull off connector.

–	Check the contacts on the connector and on the fuel delivery unit for damage.

–	Connect test instrument adapter/DSO (5-pin) -VAS 5565- to connector and fuel pump unit.

–	Connect remote control for V.A.G 1348 -V.A.G 1348/3A- to test instrument adapter/DSO (5-pin) -VAS 5565- and to battery positive (+).

–	Connect a contact of injector to be tested to engine earth using auxiliary cables from auxiliary measuring set -V.A.G 1594 C-.

–	Connect second injector contact to remote control -V.A.G 1348/3 A- using adapter cable -V.A.G 1348/3 - 2-.

–	Connect crocodile clip to battery (+).

–	Operate remote control -V.A.G 1348/3 A- for 30 seconds.

–	Repeat check on other injectors. Use new measuring beakers.

–	After all injectors have been activated, place measuring beakers on a level surface and compare the quantity injected. Specification: 85…105 ml per injector.

When checking the quantity injected, check the spray pattern as well. The spray patterns must be the same for all injectors.

If the measured values of one or more injectors are above or below the prescribed specifications:

–	Renew defective injector → Chapter.

Note

After replacing components of injection system, erase learnt values in engine control unit → vehicle diagnosis tester “Guided fault finding”.