"K. Smith" wrote in message ...
The Cummins system senses manifold pressure so although your turbos
need service (maybe) the lower pressure shouldn't mean excess fuel
getting injected.

Certainly get the unit injectors serviced, it's more likely poor fuel
injection pressure or atomisation causing the unburnt fuel out the exhaust.

Once the injectors are up to snuff, the new performance will probably
bring the turbo pressure up a bit also.

The turbo(s) have full floating plain bearings with lots of
clearance/play in all directions so despite being more than "spec" if
they're not allowing oil "in" they are not likely to be the root cause
of your problem.


K



thanks for the reply K.
On of the turbo's did have serious a problem, but the other didn't.
The injectors are next on the list.