Air injection problem. Pro's please help

[DMITRY]

Here we go again. I had this code 11 (Air injection fault) on a diagnostics unit a while ago. Kept taking car to the tech. First he replaced the O2 sensor (and other tune up, I had a post about it). Chk. engine light came on again about a week later. Took it back to the tech, this time he replaced the cooling temperature sensor. Week later the light came on again. MAS sensor was replaced. Now it’s on again ! Same damn code. What could this be? Tech said that he checked vacuum and it was ok (eve though the economy gouge is up a little when car is in gear and stationary) My gas mileage is down to 16-17 mpg and I notice that the power and acceleration is down.



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Dmitry
90' 300CE
17" Lorinsers RS90
Brulen mufler
Clear Blinkers
White gouges(made my own)