The car is a 97 mod 230 T, benzin., WDB2102371A528670
I solved some of the problems when I disconnected the battery to reset the ECU.
I think the reason for these problems was not dirt in the vacuum-system but the ECU going crazy when I mounted the two vacuumhoses to the headslamps previous being loose. Does it make sense??
The symptoms that still make trouble and have been there since I bought the car:
1. Max rpm(the gear in P) is approx 3800 –pressing the accelerator further makes the rpm going up and down.
2. Starting half-warm engine it will go normally for approx. 30 sec then rpm starts to go up and down, the engine looses power, like some cylinders stop working, and engine almost almost stops. This will last for 15-40 sec for then to be normal again.
No problem when starting cold engine.
3. The engine is more slow in acceleration than you could expect from such a car.
Suspecting vacuum problems I have been looking for loose cables or leakage in vacuum but I`m not so experienced in this field.
I found a loose, open vacuum hose under left headlamp ending in the firewall on the passenger side, see picture:
Also found a loose grounding cable near the intake that I don`t see where to fasten, se pictures
Thanks for help!