Originally posted by MrCjames
The EHA reading appears to be compensating for a lean condition so you may want to double check your fuel injector seals and your intake for air leaks. Also, have you installed a new O2 sensor lately? My preference is to recommend a new one every 60k, 90k tops, to maximize fuel mileage.
That push water stuff isn't so cheap anymore!
No, I have not installed new O2-sensor. But I have checked it with multimeter and gets the correct values.