Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Just about anyone can get a fueling system to dump so much gas into an engine at cruise to make those following close behind puke from the smell of an overly rich mixture...not to mention poor gas mileage too.
The range of accuracy for NB O2 sensors is .400v to .800v, which translates into 14.2-15.0:1 AFR. Once the fuel ratio is outside these limits, the accuracy of measurement rapidly deteriorates. This is why NB sensors are most-often used as a 14.7:1 AFR voltage switch.
The XiED works great for cooling a motor a bit (fattens up the mix across the board). I ran them for months. But I wanted to get rid of an annoying surge and decel pop, which the XiED did nothing for. Its worth only a few points A/F WOT but sometimes that is all you need.
How can xIED affect WOT when the stock O2 sensor ceases to work after about 50% TP? It is well-beyond its functional range by the time it gets to WOT.