How much timing does the EEC-IV add? I know I have seen this posted before but couldn't find the info when I searched.
slvr302 said:How much timing does the EEC-IV add? I know I have seen this posted before but couldn't find the info when I searched.
that sounds about right. do you think it dials in more for a full flow of EGR gasses?giddyup306 said:I think under WOT conditions it raises timing to around 30* BTDC. Not 100% though.
HISSIN50 said:that sounds about right. do you think it dials in more for a full flow of EGR gasses?
that is a nice synopsis and makes sense, though that is more about the function of the system. basically (in my crude simplistic thinking) the PFE system is one component that tells the EVR how much EGR gasses to introduce (not unlike feedback from an O2 with regard to fuel trim).giddyup306 said:Don't know if this helps or not.
The PFE sensor, through its internal electronic circuitry, provides an analog voltage signal to the PCM that the PCM can compare to values on its lookup table and determine EGR flow. The PFE differs from the EVP monitors only EGR opening. The EVP leaves the PCM to assume there is no carbon buildup or other restriction hampering EGR flow. While this may be true for newer engines, it is rarely the case for those in service for any length of time. The PCM uses PFE info to fine tune its controll of EGR valve opening, more accurately controll a/f mixture and modify ignition timing.
Make any sence?