Internal filter baskets can deteriorate in some VW/Audi FSI and TFSI injectors, including those used on the EA113 2.0 TFSI. A restricted filter or displaced debris can affect fuel flow and spray pattern. Contamination and electrical or sealing faults are other possible causes of injector problems.
Symptoms can include rough idle, difficult starting, hesitation, misfires under load, fuel-trim changes and reduced power. These symptoms do not identify an injector on their own: ignition, fuel supply, air-path and mechanical faults can look similar.
Fuel-system work needs clean tools and fittings. Delphi describes contamination introduced during repairs as a risk, while Hitachi warns that dirty fuel and particulates can block filters and damage components.
Before tuning an older or modified GDI engine, establish injector condition rather than assuming every cylinder receives the same fuel. Our ASNU setup can compare supported injectors for leakage, flow and spray behaviour. It includes additional control equipment developed in-house.
A GDI bench pass applies to the test conditions. It does not rule out a fault at higher vehicle pressures or a different temperature or load. Cleaning cannot repair damaged internals. Confirm the make and part numbers with us before removal; common-rail diesel injectors use a separate Delphi bench and VW PD unit injectors are not supported for bench testing.
We begin with vehicle evidence and an agreed diagnostic plan. The free initial code scan and assessment does not include dismantling or detailed testing. Filter service, injector repair or replacement should follow the findings and the requirements of the particular injector.
