[twobjshelbys]

I had the Roush 427IR setup (8-stack with an Accel DFI controller). Mine originally was mounted on the passenger size, fairly horizontally - that is the way it has to be. We kept getting bad feedback at idle when air would come back into the pipe and confuse the sensor. We moved it to one cylinder closer to the engine and it ran great after that. You depend on that one cylinder being "representative", but honestly, if you're only on one side, you're depending on the other side not failing either, so nothing is perfect unless you go to a dual sensor and can get it close enough to keep the sensor hot. Note that these DFI systems have a very wide capturing range and will attempt to compensate A/F when something is wrong. You'll notice it when it does.