Hello all, I have an 06 explorer limited with 82,000 miles that started kicking po171 and 174 the last couple of days. I installed a k&n fipk about 3k miles ago. Ive been poking around here and on the web and every one seems to think its a vacuum leak, however I have sprayed the engine down with carb cleaner and I can not get the idle to increase. The engine almost feels like it is missing not really under load but more when you let off the throttle. I plan on getting some maf cleaner tomorrow to try, even though I pulled it out tonight and it looks spotless. All of the references to this problem point back to the older explorers with the 4.0 or the 2v 4.6, I cant really find any info on the newer stuff. Thanks in advance!!