Hi, this is my first post so Iím hoping you can help. My 51 plate Astra Estate 1.7 tdi (Isuzu) is seriously lacking power; it was working fine when I pulled in from work but the next time I went to use it, the car started as usual but when I pulled away it felt like a moped engine had been fitted overnight! No engine management light was showing and the engine sounded fine at tickover and reved well at standstill.
Between myself and my local garage the EGR valve has been cleaned and checked, the turbo wastegate checked for vacuum operation on the bench, hoses checked for leaks, exhaust checked for blockages, the wastegate solenoid is working.
Iím at a loss as to what might have failed overnight Ė wouldnít any sensor/electrical failure produce a fault code? Could the self-testing ECU be at fault and not detecting itís own demise? Any suggestions gratefully received
Thanks in advance