EGR removal - remap required?
I understand the principles of removing the EGR from my remapped 156 JTD 2.4 20v - If you consider there are 10 parts of air/fuel mixture in each cylinder, roughly 8 parts of these will be fresh air/fuel, 2 will be exhaust gas that has been recirculated. This is mainly at low revs/load as I understand it? A crude and simplistic description I admit.
I would like to remove the EGR for better power and mpg. I plan to then clean any areas affected by the EGR - remove any soot from my turbo's variable nozzle arrangement, clean MAP sensor, inlet manifold, etc.
My question is: If I simply remove the EGR will I damage the engine? And is a further re-map necessary or just recommended?
Logically, the AFR will be incorrect, as it will be missing the 2 parts of re-circulated air. But then that re-circulated air doesn't really combust. So I've confused myself about what would actually happen! Between the MAF, MAP and O2 sensor, will the ECU simply look to a different section of the tables and maintain the correct AFR?