So, my blue headache (bmw 318ti) started having some idle issues. Being excessively cheap, I decided to attempt a DIY fix for my problem. After reading numerous forums, I've found the culprit to be the PCV/ECV valve. This particular part is used to recycle some of the valve cover gasses to maintain some semblance of "emissions standards." However, when excessively worn, the valve allows extra air into the intake causing idle and fuel/air mixture issues.
Well, I don't live in a state that has emissions tests any more, so let's bypass that sucker!
DISCLAIMER: modifying engine components can and will void any sort of warranty (not that anyone on this site is worried about that). Working on cars is dangerous, accept that you will get burnt, crushed, sliced, diced, and killed. With that in mind, watch your digits and be careful. I accept no liability for any modifications that cause engine failure, engine explosion, or cause the engine to disappear into another dimension. Nor do i accept any liability for personal injury, unless there is a wormhole involved, then it's totally my fault.
Step 1: Get the parts together
There is a lot of leeway with the actual materials list on this one.
1x small paint can and lid (this can be substituted for any container, though i'd recommend metal)
1x coupler to fit hose
1x nut to tighten coupler
Length of hose (determined by the size of your engine bay)
Tie Wraps to mount can in engine bay
Drill with bits appropriately sized for coupler and vent holes