Originally Posted by
Andrew010
The message on the dash appears for 3-5 secs. The actual regen process takes 10-20 mins. It dumps raw fuel into the cylinders on the exhaust stroke on one bank of cylinders to heat the exhaust so it can burn up the soot in the filter.
Not all fuel makes it out the cylinders, some washes down the cylinder walls into the oil. Most refer to this as 'making oil' and is something one should keep an eye on. The more active regens the truck has and/or excessive idling while the engine is not up to temp, the more you should check your oil level/quality.
and the alternate design is to have an additional injector in the exhaust pipe someplace after the turbo and before the DPF filter.
it adds another place to leak, and different injector part than the one in the cylinder, a different fuel pressure, some wiring, some hoses, and some different computer programming..
Ford decided their approach (in the cylinders on the exhaust stroke) was less expensive, lower maint, overall. Chevy went with the additional injector
Sam