[Dynamics99]

Hi,

Went to start my '04 Z4 3.0i 6M and the car would not crank. Had the starter motor replaced 2-3 months ago. It's been 3 days since I drove the car. Tried to swap out the ignition switch and no luck. The radio would not come on but the AC would work. Checked the voltage on the battery and it read around 8.3 Volts. Put the battery on a Noco Genius charger. I do have a dash cam hooked up to the fuse box but it has a parking feature that only runs on the dashcam's battery once the ignition is turned off. In addition to that I have grom bluetooth adapter. Every time I cold start the car it dies but starts fine the second time. If I give a little gas on the first cold run the car bogs or seems to misfire for a couple seconds and which I got codes on my reader for on all 6 cylinders. Where should I start diagnosing?