1990 200e not working propertly when warm
 

Hi!
I have a '90 200e with ke-jetronic
Cold starts and idle are great, but when the engine gets to 80C, rpm starts to fluctuate a bit. When i start driving then there is no power, engine is like coughing, but if i press throttle to the max, it will fly like it has nothing wrong.
I have replaced spark plugs, distributor rotor and cap, fuel pump, fuel lines.
Currently have no ideas whats wrong with it.

You need to start with measuring fuel pressures and duty cycle and read some error codes if there are any.
One or more of the closed loop lambda components must be faulty.

Troubleshooting
 

My vehicle started to stall then stop.Then l restart an go.Now it's starting but when you rave it it's not raving as normal on high revs.when you try to take off no pulling well.what might be the possible cause?

Is this a coincidence or the same poster? They are identical E200 1990 cars not normally found in SA.
If it is a different poster same advice applies that I put up on the second reply above.