My little one is having problems. Maybe you have ideas what it could be:
Cold start no problem, but warm start (engine shakes and organizes, sometimes it struggles and starts and then runs well, sometimes it goes out completely and you can try it again.
What has been exchanged so far (currently approx. 111000km)
- coolant temperature sensor as described above (current)
- About 2-3 years ago filter unit including gasoline filter & fuel pressure regulator (there was a similar problem before, but not the same)
- I also replaced the crankshaft pulse generator at that time
- Gasoline injection nozzles were also replaced not too long ago.
What I've tried so far:
When it is warm the key is on ignition for longer so that fuel is pumped. -> No improvement
Key 2-3x on ignition without starting -> as above
Have the pressure measured at the front. When the car runs approx. 4 bar, when it is warm, the pressure drops to approx. 2 bar (but I think that is still within the limits?)
Unfortunately I haven't measured it cold yet. What was striking was that there were bubbles in the gasoline during the bad warm start ... Now the question is, of course, where? Can't the fuel pressure regulator in the tank be over again, can it?
It is a R171 Bj 2008 with 184PS.