Cm871 bad fuel mileage and black oil soon after changing

[tree98]

Very first thing you need to do is have your program looked at by Rawze.

Whatever you do DON'T take the egr cooler or any other emissions components off your truck, even though they aren't operational, taking the egr cooler off blocks coolant flow to #5,#6 cylinder's and will cause water pumps to fail and also run those cylinder's hot.

In the meantime you need to pull the dpf and doc off to make sure that someone didn't just drill some 1" holes through the honeycomb. It needs to be 100% hollowed out and free flowing with no restrictions.

Also don't let anyone talk you into replacing your VG turbo with a fixed vane, DON'T DO IT!!!!