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I have a 2006 Elise I've been having difficulty tracking down a P0171 with the past few months. I've tried multiple things to repair it, and it just keeps returning. The car has been smoke tested for vacuum leaks, the PCV valve, coils, spark plugs, and the MAF have both been replaced. It was also inspected for any exhaust leaks by the dealer. The dipstick tube was checked as well. Here is monitoring via DashCommand I performed while the car was idling, and with a few revs. I'm looking for anyone who understands this stuff to give me some insight on what they might see in the diagnosis. Any help would be greatly appreciated.
IMG_1911_zps2dc2cae4.mp4 Video by Razorub | Photobucket
IMG_1911_zps2dc2cae4.mp4 Video by Razorub | Photobucket