The good old blue roll test. A quick test to identify weeping port injectors from the VW Audi 2.0TSI EA888.3 engine. The port injectors are really prone to weeping/leaking. Unfortunately, cleaning them will not resolve this issue; the cause is a physical mechanical issue. Running them through the cleaning processes can make them work and seal okay for a short time, maybe 5 minutes, maybe a week or two. But they will always start to weep and leak down the line. The good news is the port injectors

Prokomon 11 Pieces Noid Light Test Kit; Fuel Injector Noid Light Tester Kit with 8 Noids for Most Cars