R129 SL500 Built 94 Pfupfer problem limit

What else can it be? Fuel supply? What else did the car pump except the two, the filter? These have been changed by now. Kat I looked in – looks great like new ignition cable renewed, candles, distribution caps again cleaned and fingers, ignites are new, hoses glued on, fuses checked. Lambda probe and the plug on the transmission no change, crankshaft sensor renewed. Ignition control unit other on it no change The car jumps on super. Even if it gets warm it drives still well but then so after about 20min starts the pupfern. It feels harder because it has to drive in spite of the 91er the relay a little bit more empty. Because it just plugs, or misigns or maybe also empty ignitions, as in the empty part at then accelerates. What can it still be? Fuel relay? That somehow doesn’t work properly? Can you put the relay in the 94er test way again? Sensor that is at the gas pedal?