Air & Fuel Filter Restriction
Air & Fuel Filter Restriction
(OP)
After many years working with carburettor engines and the problems caused by the above, I have yet to see any clear facts on how air & fuel filter restriction affects engines with fuel injection and engine management systems. It would appear that the EMS must compensate, presumably by reducing power output to maintain correct exhaust gas balance.
Is anyone any better informed?
Is anyone any better informed?





RE: Air & Fuel Filter Restriction
Fuel filter restriction might flag an error code due to low fuel rail pressure, but other than that would not be compensated for so the engine would run leaner than expected at high power. I suppose the flag could be used to force the engine into a limp home mode with a reduced red line but AFAIK this is not done on ours, since we don't measure the fuel-rail pressure. Persistent lean running might flag an error, but I doubt the mixture is checked at WOT since it is open loop.
Cheers
Greg Locock
RE: Air & Fuel Filter Restriction
Blacksmith
RE: Air & Fuel Filter Restriction
RE: Air & Fuel Filter Restriction
Blacksmith