Today I started my e46 330 and had a coolant light on. Noticed the ET was almost empty. So topped it off. I think i have a leak somewhere. Everything has been replaced in the cooling system in the last 25k. But then left and drove to the end of my street and it began acting up with an idle issue. It'll misfire here and there then shudder momentarily. No CEL. I dont think these two are even possibly related...just coincidental? Once i'm moving it seems to run ok. Also noticed as of late that the accelerationfeels pretty sluggish. My gas mileage hasn't changed. So did tons of searching and found tons of information on the bazillion things that can cause this...one of which was the possibility of a soft fuel pump failure. It happened with about a 1/4 tank of fuel...but i havent filled the tank yet to see if it goes away with more fuel. Just parked it in the garage and took my other car. So I ordered one just for preventative maintenance since they aren't to expensive. I need to check the lower intake boot for cracks yet, already replaced the upper one. I also plan to check the vacuum system. Vanos hasnt been done yet either (i'm at 105k and its not making noise, so didnt want to touch it). Fuel filter is new in the last 20k. I'll keep you posted, but anything else I should look at that I over looked?