The biggest issue was climbing a hill and needing to accelerate to maintain speed. The tranny would shift down and the rpms would go up, but the engine would seem to bog down and not accelerate.
Try checking the intake hose between the MAF and the intake manifold. Look for cracks and make sure the wire hose clamps are tight. Removing /checking the air filter without removing this hose will cause it to crack and cause your symptoms. I had the same symptoms and this solved the problem.
I really did not want to cut any holes in my FJ so with a lot of research I came up with the following solution: Kenwood Stereo with Bluetooth, USB and auxiliary jack for my Iphone hidden in a Tuffy console. For the speakers, I have both front and rear pairs. For the rear speakers I installed...