With my 6.75l V8 Twin Turbo Arnage, the engine shakes slightly in the empty run. After switching on, you don’t feel anything yet, only after a few seconds when the speed comes down to 650 rpm (normal idle speed). It’s regular small bumps he gives all few seconds of himself. You can also hear it from the exhaust. All ignition coils Ignition cables and spark plugs are new Fuel filter is new He doesn’t show any faults. Petrol pressure is only 3.5 bar in idle and the pointer twitches slightly to 3.7 if I play with the gas. 2x petrol pump from Bosch is installed. Does it seem to me far too little for suction pipe injection. Power supply is tested. Is it already in the bucket after 124,000 km? Well the car is 19 years old. I did not find a regulator valve and is not visible in a diagram either? The successor models have one, according to the diagram and parts catalog. Does anyone have an idea about what I could still look at?