W116032 450 SE USA Benzin in Öl

Good evening Volker,
Unfortunately I don’t know about any supplier for this connector in CZ (for this particular car the old connector was reused).

Regarding the discussed topic w116 450SE – gasoline flooding:
Here are the oscilograms recorded after the change of the wires on the injectors 2 and 3:



Now Engine can be started up, the running is smooth, time of the injection impulses shortened to 3 ms when the engine is at idle speed and operating temperature 80 degC. Tomorrow I will check the wiring harness and sensors, and also will do the emissions test.

BR.Peter

Hi Petr,

I use the Czech version of Peter and hope that is okay.

Now it looks much better. However this change in pulse length cannot have come from the wrong injector group sequence. So maybe 10 ms was not there from the beginning.

Doesn't matter, main thing is that it runs again. Wishing all the best for tomorrow when fine tuning the engine. Don't forget to grease trigger contacts with "Heißlagerfett" and verify proper fuel pressure.

Please spread this website to others in Czech republic. I saw that you are active in CZ MB club.

Hi Volker, I will spread this forum all around the proffessional forums like www.fcd.eu Due to the high level of the knowledge here I am afraid that posting this forum on the usual Czech public forums would destroy the spirit of it :cheer:
But anyway, I will share the link all around the link is already on the diagnostic forum full of professionals this forum is partially paid by users

BR.Petr translated Peter

Hi Volker,
I wanted to send the update on the car. AAV was replaced, works correctly and fine. Thank you again.
I checked everything else on the car, so all sensors are ok, cables corrected, ignition set up, vacuum lines corrected, fuel pressure set up. Car runs good, but still has high CO and CO2 (approx. 7-9 %), I can't get better values. Even the button on ECU is on the lowest value, and idle speed screw at minimum.

Here measured the length of the injection.
Engine temperature of 85 C
850 rpm
T=2,64
Rgds, Petr

Hi Petr,

did you check and adjust idle run switch on throttle switch? If it does not close (measure pin 17 to 12 on ECU), ECU will not adjust idle-run CO. Have a look at chapter "Wartung", there I describe how to adjust idle-run switch. Sorry, haven't translated it to English yet.

Good to hear that auxiliary air valve works well.

Hi Volker,
Tomorrow's check up, but the potentiometer on the control unit has a response.
CO can be increased.
Will study everything again and report.
BR. Petr