simon69

99.5 audi a4 1.8t quattro, I've got this issue where if it is below 40-ish degrees Fahrenheit the car will start and idle for approx. 6-10 seconds and the car will shut off. and throws the code 18010, which is a low voltage code. (I also put in a brand new battery in november) and sometimes cel flashes when the car turns on. I tried starting it with maf unplugged and still dies.(I also replaced maf in september) when it's cold it'll take about 10-40 tries to keep it running and driveable without it dying. if I turn it on and keep rpm's high like 2k as soon as I let off it'll die. However when the car warms up it doesn't stall or die, but if it sits for 5-ish hours or more this happens again. It recently has been getting way worse as sometimes the car wont even turn on. this is really bothering me, any ideas?

Panzer A4

Sounds like a major vacuum leak or intake leak.
But 18010 could mean a bad battery/alternator. If not enough power is available for the injectors, the engine could stall.
I'm surprised you aren't seeing more codes.