I've been triggering these codes, and setting the CEL ever since I installed the supercharger. In the past, its been that the nut for the EGR had come loose. These codes are for low O2 voltage, and low MAS readings.

This past week the codes have been coming on more and more frequently, today coming on every time I gave it more than half throttle. The engine had no power, and felt like the ECU was pulling timing. I travel with a 22mm open end wrench to constantly tighten the nut, but this wasn't the solution.

These codes imply a lean condition. This had to be a leak somewhere after the MAS, and before the supercharger. The engine was taking in extra unmetered air, and not getting the fuel it needed for it.

When I arrived home today I pulled the intake, and found the cause. The intake air sensor was loose in the intake elbow.

The reason for this is the location of the sensor. The sensor needs to be moved back slightly to take the strain off of the harness. As it is now the harness needs to be unwouond back to even plug this sensor in at all.

I will be making a complete new intake these holiday weekends, and will post completed pics, and material sources.

John C.