I just went through the DIY and decided to clean my solenoids before replacing them. The problem was that under WOT it would occasionally/usually give me the yellow dashboard light which was described in the manual as "engine malfunction with adverse effect on emissions". So i removed both solenoids, cleaned them, and put them back on, but this time i put the exhaust solenoid in the intake hole and vice versa to see if it made a difference. When i started the car, everything seemed to be fine at the beginning so i took it to a test drive and after about 2 minutes of occasionally flooring it, the yellow light came on again and stayed on. Now it's always on. Quite terrifying. Any ideas guys?
Oh and my car is an lci 325i.