HI , i have a Corsa D 1.3 CDTI diesel. 2007 i have had quiet a few issues with it and i am slowly getting to a result. long story short i have replaced the following, ECU, EGR, Starter, Battery + MAP sensor. the car seams to be ok but my fault is loosing power.. driving around town the car...

can anyone help with Astra coupe 2.2 g 2001 with aircon. I'm trying to trace a fault, or a short, it's eating my battery up in a couple of days. Things I've done. Put new battery on, sits at 12.8v when fully charged. Started car, checked voltage goes up as much as 14.6v, alternator is good...