zusatzluftschieber Djetronic MB

Do you hear fuel ump for 2 seconds when you switch on ignition? Do you have spark on spark plugs, does car have +12V on pin 16 and 24 of ECU? What is fuel pressure now?

guten abend ,
I'm back with new questions..
I started my vehicle, which I could not run in the morning, after 5-6 more trials in the evening. Since the battery weakened during the ignition in the evening, I charged the battery with the cable from the other vehicle.After working for 10 minutes and warming up, when I turn the engine off and on, it works quickly without any problems. Or when I use the vehicle all day, I don't have any problems when I turn off the engine and start it again during the day. But if I park the car in the garage and don't use it for 3-5 days and I don't start it at all during this time, when I want to start the car, I encounter the problem of not starting this morning. Even when I try to start it many times, the battery gets weak. I can't succeed. Last Sunday, I used the vehicle without any problems. I tried to run it again this morning, but it didn't work. What could be the problem?
second question ,
What should be the ideal CO value in these vehicles? (w114 280E)
It is measured with an exhaust emission measuring device.
thanks ,best regards.

Hi Kerim,

how quickly do you loose fuel pressure when you switch off engine? Sounds like you have a leaking injector.

CO for your car should be up to 2.5% @ idle-run of 750-800 rpm.

dear dr volker ,
thanks for answer and help.
I measure the fuel pressure from the fuel pipe next to the cold air injector. When I turned off the engine last week while the manometer was connected I waited 5-6 minutes. pressure remained constant at 2 bar. There was no drop. I hope I am measuring the system pressure from the right place. You said CO2 for your vehicle should be up to 2.5% at 750-800 rpm idling. Ok, but isn't there a lower limit for this? For example, is 1% CO suitable?
thanks .
best regards
kf

Hi Kerim,

if pressure remains at 2,0 bar when switching off, you are okay. Measuring by removing hose to cold start valve and inserting manometer there is okay.

Bosch has no lower limit for CO. I would use 2.5% .

thanks dear dr.volker
I think I will continue to investigate what is causing the problem. I think the problem is caused by the thermal timer, relay, and cold injector trio. I will focus on these 3 points.
how do i send the künefe to germany? )