2007 Camry 3.5 with about 300,000 mi. The car usually runs great, (It still does even now), and I decided to do some things to ensure that it stays running well. I changed the valve cover gaskets (they were leaking), and the rear plugs and coils (Denso). I'd already changed the front ones. I also changed the engine mounts, the belt tensioner, the valve cover hoses, the injector o-rings (cleaned and tested after replacing the screens), the upper and lower intake gaskets, both sensor 1 oxy. sensors (Denso) (I had never had to change those, but 300,000 mi. I thought it was a good idea.) , the pcv valve, the broken air filter box, inlet snorkel, the power brake booster hose, the purge hoses, and broken connectors (one wire at a time). After I started to drive it again, I got a circuit A code for the MAF, so I carefully cleaned it. No help. I replaced it with a Toyota part. The code doesn't come up anymore, but I still have very high LTFTs at about 35% both banks! The problem seems to lessen when I accelerate the engine, so I suspected a vacuum leak (although the engine idles at 21in.). I smoke tested (many times), carb clean sprayed, and soapy water sprayed to no avail (including the power brake booster). I also tested the fuel pressure. It's about 49 psi, and stays there at any rpm (I changed the fuel pump not too long ago.) The last thing I did was jump the fuel pump, and I got exactly a quart in 15 secs., which seems good to me. I also timed the fuel pressure reading after the engine is shut off- starts at 50, then 40 after 28 secs., 30 at 2:50, 25 at 5:00 (seems good to me), 20 at 8:15, and 15 at 13:34. I also put a vacuum on the exhaust (after plugging the other pipe) and sprayed the bank 2 (the only one I can get to easily) manifold with soapy water to see if it's leaking. It doesn't seem to be. I really like your videos, by the way, and I hate crooks!