Hello, the EGR gets blamed for lot of things, often rightly, often not. You have replaced yours now so hopefully mechanically now ok if associated pipes are clear and reconnected tight.
Another very common thing would be a wiring fault such as corroded or breaking connector contact and in some cases frayed wires. Remove and inspect the EGR wiring connectors, even the friction of doing so might help.
Depending on overall condition of your van and if water gets in around the wiring boxes, mostly around the headlight and near the air filter, it might be worth a good inspection in those too.
Have you rescanned the live data? Did you actually see the actual actuator line depart from the demand very much? Scope the air pressures too, on my van they follow exactly unless you coast the engine.
Flat power indicates insufficient air or fuel. When was the fuel or air filter last changed? Anecdotally I don't think diesel Ecus are very good at generating faults due to starvation of either air or fuel and might simply adjust parameters to a limit.
Maybe the turbo?[/QUOTE
Service had been done previously that was my first port of call. Live data says that the air and fuel are OK. Done an actuator test on the turbo, tuobo position sensor says it is ok, done a command test on the EGR valve it is opening and closing, stripped the wiring from the EGR to the ECU all 4 wires are OK. I know what you are saying about logging a fault code but none are logged and none pending. I am using a fiat dealer diagnostic system. I WILL get to the cause of it eventually lol ?
