Seat Leon FR 1.8 TSI DSG (2013), EPC & engine light illuminated

[huzyM]

Where do I start???

Bought the car in March last year as a cat S with 50k on the clock, it ran fine for a total of 3 whole days before the EPC and engine light illuminated for the first time. The auto stop/start system was disabled and there was a lot of white smoke from the exhaust as I tried to get the car to crank over. After diagnostics it seemed as though the fuel injectors were stuck open so these parts were replaced:

• Spark plugs
• Coil packs
• All 4 direct fuel injectors
• 1 injector on the manifold
• Fuel pump membrane filter

After this the car ran smooth with no issue besides the fuel gauge on the ICU displaying no information. Fast forward to a few months ago (6 months after initial work) we have the water pump in the cooling system changed since the engine was 'overheating', the very next day after a few hours of driving, the car goes back into cardiac arrest with EPC and engine light back on the dash, at this point the whole fuel pump was replaced too but again, no difference. This time I decided to take it to SEAT, big mistake, paid over £500 for them to say it needs an ECU replacement before they can diagnose any further. Already so deep into this money pit I got a new ECU fitted and coded externally, to no avail.

As the car is now, there is a jumping misfire. The car will start from cold and it will run okay for 5 minutes at best before it reaches optimum and the EPC and engine light forces the car to shut off. If it decides to crank over the car will go into limp, the car will judder hard and obviously won't go past a certain RPM, there is no white smoke this time around but the more you drive and the more it shuts off the less likely it is to crank over. I'll attach the diagnostic notes from SEAT along with fault codes. Based on the fault codes and previous work, I myself am ruling out the possibility of faulty fuel injectors and looking at the possibility of a vacuum leak somewhere or maybe electrics. I am by no means an expert in cars but I am grateful if anyone can shed some light on the topic, really struggling for ideas and anything will help.

Thank you for coming to my Ted Talk,
Huz