Durb wrote:
My 5.9 Cummins has no sensors on the exhaust stream manifold to tailpipe. How does the engine know to de-fuel do to high exhaust temperatures if it doesn't know what the temperatures are? My Edge CTS does not read EGT from the diagnostic port but rather from a pyrometer that I installed separately.
It depends on the engine.
For instance the old 1994 on up 6.5 will defuel if the water temp gets over 225 degrees F. It will also defuel if the boost pressures get out of spec.
PS, weak powder rods on the 7.3 have nothing to do with how hot the tops of a piston can get before melting.
