Hi, I've been through the wars with my 2.2 recently. I have 205k on the clock.
I had bad misfires under load and the tech2 pointed to the injector pump.
However, changing the fuel filter solved the problem, the filter was treacle black.
I then had a split inter-cooler hose, ok sorted that.
Now, while cruising at 75mph a gradual hill will trip-out the cruise control, Prior to tripping out she gets a bit juddery, like a slight miss-fire. Under load she is very smokey, black smoke. After several trip-outs of the cruise she goes into a limp mode which allows about 75-80 mph on the flat. A brief stop and restart has her back to nearly full power. I fitted a new air filter, no change.
Is this the fuel pump on the way out.