To Senatorman ask for help

Hi have been “almost proud” owner of a Senator-B (C30SE) for about 2 months. But I noticed some defects. 1. Push at 4000 rpm has been off for about 3 weeks (have already checked underpressure lines, everything is fine. Dual Ram switches up at exactly 4000 rpm and the underpressure is maintained even at longer periods of time. The petrol pressure regulator probably pucks, can it be that the controller does not work properly anymore? Have also already read out the error memory but except the The LED on the passenger side only flashes (system error according to the manual), which all 4 sensors are flattened is rather unlikely. Would have liked to read out the fault memory but the suitable heat cable is not available on my diagnostic connector, just as the heat cable for the ABS is not available. 3. ABS does not work. I already found a plug and the matching coupling (Schwartz-Red cable) plug was pulled out of the clutch both plugged together. After that came a very noisy noise from the engine compartment, therefore I removed the plug again. Can it be that the ABS pump is defective ? Can I just replace the pump like this ?? New or used ?? Omega-A / Senator-B ???? Why is my diagnostic plug used the heat cable for the automatic transmission, although I have a have a switchcar ??