When stationary engine usualy can rev up no problem but under load it behaves slugish if something is wrong .
Blocking the egr valve will give it a few more horse power but don't expect miracles .
If injector 1 doesn't work properly than engine (under driving condition)will hardly rev up above 1800-2000 rpm (limp mode) and there would not be any dashboard light showing a fault.
Check the turbo by removing the hose and feel the turbo fan with your fingers if moves freely with no side play . If ok go to the actuator and check for free movement than check intercooler and hoses for cracks .
Turbo won't kick in only when driving (under load) and rpm is above 1800 rpm . You should hear it if listening for a wistle like sound (turbo fan reving up ) . Let us know . cheers
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