Alfa low throttle jerks
Hi, i have noticed that my Alfa 147 1.9 JTDm jerks when i'm pressing the pedal gently, maybe 20-30%. I have a diagnostic tool so i have been driving around with it and monitoring various parameters. Everything seems fine except for the fuel pressure. Sometimes when i accelerate and release throttle, fuel pressure sticks around 1000 Bar and starts displaying random values. Sometimes the actual consumption peaks high when driving slow, like it shows 2 times more than usual(around 18l and it looks like it happens at the same time when the fuel pressure is displaying wrong values but not sure). It feels like a loss of power or engine breaking, then it jerks and after i pass that pedal range it pulls straight away(Pressure values are correct at higher load). I have checked the pedal potentiometer and it displays correct values. What i was thinking is that one of the components is giving wrong pressure values and because of that the pump is underfueling(Maybe ?). Everything else looks fine and the car performs excellent other than that. Do you guys have an idea what could it be ? Also, what are the correct injector fuel correction values for JTDm engines ?