Fuel Injector Cleaning: Improve Performance

hi everyone,

I have a question regarding experiences with refurbished fuel injectors.
Last week, I took my fuel injectors to the Bosch service center for an overhaul after they had been in use for 160,000 km. They found that the injection pressure was 180 bar (the target is 190 bar) and offered to readjust the injectors, which I then had them do.

Since the injectors were reinstalled, I can no longer reach the maximum speed.
'Now, I'm using about 1 liter more fuel every 100 kilometers.'
The demand for nail services has increased significantly.

I've also tried centering the fuel injectors in their guides on the cylinder head, but it didn't reduce the noise.

Can the guys at Bosch actually calibrate two-stage injectors?
Is it possible that the injection pressure of the second stage is not correct, since they can only check and adjust the first stage?


P.S. He finally passed the exam, he doesn't smoke anymore , but he also doesn't have much energy anymore .

Hello,

Does the needle lifter still work?

Best regards, Rainer.

I think so, I've only ever used a screwdriver on it once. I think it's still working.
To what extent can I examine this device more closely?

Would you recommend that I make some new ones?

What does the error memory say?

Are the IMM values okay?
Is the print quality okay?

Have you read any technical articles on troubleshooting performance issues?

Yes, everything is fine.
Furthermore, the acceleration before the overhaul was significantly better.
Shouldn't I just put some new ones in?
At Seat, however, they can be really expensive!
'Or, do you have any good tips on which injectors would provide a bit more power without damaging the pistons?'

stop:

Have you checked and possibly corrected the fuel injection timing after installing the refurbished injectors?

Yes, I did, but it only changed very slightly.

Well... it would be almost too good to be true... Cleaning carboned-up injectors might be useful, but it won't make worn-out injectors new again.
If your engine is worn out, washing it won't (unfortunately) make it like new again.

We now offer new nozzle inserts and refurbishment services in our shop.
http://shop.dieselschrauber.de/index.php/cPath/36

Best regards, Rainer.

Was wurde bei dir nur korrigiert, der Öffnungsdruck oder...?
Did they also replace the injector nozzles at the same time?

Only the opening pressure was corrected!

I also occasionally get an error code stored in the system.
'Maybe the problem isn't the injectors, but the pump itself; perhaps it's not generating enough pressure.'