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Beitrag: [QUOTE="ASH, post: 595899, member: 8563"] Hi John ! Please check if your fuel pressure is constant when the lambda is cutoff ! When your fuel pressure is 4.5 bar + boost pressure , then its another reason ! Please check the voltage diffrence between PIN 24 inside the motronik and the connection of the intake manifold ! When you measure a voltage MORE than 0.15V DC then put an additional GROUND wire from PIN24 inside the ECU to the intake manifold like 1.5mm² in brown , that everybody see thats a ground wire ! The best way is to install a 1 pin connector outside the ECU , then you can take it out very easy ! In these cases the motronik is reading the wrong lambda voltage , the lambda sensor is fully ok with its signal , but the motronik is reading like 0.15 to 0.25 V less and the lambda cutoff is getting active ! In the last weeks we had this problem very often , the motronik engine harness has some connection points where many wires were taken together , also the main ground connection inside the engine harness is getting worse in the lifetime of the engine ! regards ASH [/QUOTE]

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