eMvoc

I have tried AI too. Most of the time it knows ****, to be honest. But thanks

Usually when cranking the communication between tester and ECU is limited. But when it runs, it works fine. When it stops, I still can communicate with the engine ECU. So ECU is under voltage. It probably just cuts out the fuel and close the injectors, but for unknown reason. And also yes, the rev counter is moving when cranking No extra alarm or immo

VCDS Pro

Yeah, but it won’t turn off engine immediately. There is some sttutering when the engine is out of fuel.

Yes, I tried different relay. I have even changed the whole BCM with all different relays in from different running car.

It’s like this: when the car is left for longer period of time, it behaves as usual. You put the key in, you hear fuel pump running, you start the car and engine is running normally. Then after 1 to 5 minutes, no matter if you drive or idle, the enigne stop. And when it stops the fuel pump relay click. Then when you try to start it again, during the cranking, this relay is just clicking on and off - something is telling not to put fuel in and disconnect this relay. If I hold it manually, the pump is obviously still running but engine not. Time is not always the same. Sometimes it runs one minute, sometimes five. Sometimes you can start is after one minute, sometimes after 30 minutes. Immo usually stops the engine right after start. To Alasdair: This engine can also run only on crankshaft sensor. Without camshaft sensor, it just crank for the longer time. Coolant temp sensor won’t stop the engine.

Hello I am out of ideas, so I came to ask here. Maybe anyone had the same issue. I am trying to fix Octavia Mk2 with 1.9 TDI BXE engine and automatic transmission. When you leave the car, it starts just fine. It keeps running for 5 minutes and then suddenly engine stop, like you kill it with the switch, but all the lights on the dash stay on. It’s not like all the electronic dies. Then you wait for 20 minutes, sometimes more and it starts once again and run for some time and same happen again. Does not matter if you drive or idle. There is ECU EDC16U34, no faults in the memory. Zero. So far I did: Checked all the fuses - all good Checked relays and even replace BCM Three different batteries, even on support cables, booster Replacement of crank sensor Replacement of ignition switch Checked wires from ECU to crank sensor - all good Checked ECU - clean connectors, no water damage Checked wires around transmission and under battery tray - visibly no damage Checked fuel pump - still running When the engine suddenly stops I can hear click of the fuel pump relay. Then when you try to start again, this relay is just clicking - I have tried three of them, all do the same. Same with KL.15 relay on BCM. It looks like, something is shutting off the ECU, but when this happens, I still have connection and communication to ECU, so there is still power. The only thing I have not tried yet is to change the ECU. But I don’t want to do that because nobody’s going to pay me. Any ideas? Experience? What else to check?