Return Flow - Faulty CR Injector?

Hi,

Bosch solenoid injectors, 2nd generation system, new injector on cylinder 1.

Here are the values I measured during the return trips:

Cylinder 1: 7 ml.
Cylinder 2: 9 ml
Cylinder 3: 7.5 ml
Cylinder 4: 7.5 ml

The system was cold.

Other symptoms:
During driving, there's a noticeable lack of acceleration, very little power in the lower RPM range, and occasionally, for a few seconds after starting, the engine runs roughly (on only 3 cylinders).

In this regard, cylinder 2 shows a deviation of 20% compared to cylinders 3 and 4, and even 29% compared to the new injector on cylinder 1.

Do you think I can replace the injector without feeling guilty?


Greetings.
John.

Quote:

Cylinder 1: 7ml Cylinder 2: 9 ml. Cylinder 3: 7.5 ml Cylinder 4: 7.5ml

At what pressure and time, compared to what? That doesn't really say much.

It's roughly like: My bathtub is 40 liters. Do I need a new faucet?}

Hi,

Due to a slightly higher return flow volume in one injector, you must not, under any circumstances, conclude that there is insufficient power!

Regards,
Sure, here is the translation of the text from German to English:

"Micha"

Yes, it was actually defective. The intermittent clicking/knocking sound was present again after the next start, and disappeared when the injector was disconnected.

The injector was removed and tested on a nozzle tester, and it turns out that it's leaking in the return flow direction.
Then I heated the injector with hot air, activated it a few times, and at the return line, more fluid is coming out than at the nozzle .