HELP ! CAR LACKS POWER IN LOW REVES AND STRUGLES TO PULL AWAY FROM JUNCTIONS UNTILL IT REACHES 2500 - 3000 RPM AND THEN IT TAKES OFF WITH A LARGE PLUME OF BLACK SMOKE. ONLY CODE THAT SHOWED WITH MODUS WAS AIR FLOW METER, REPALCED THAT + TURBO BOOST PRESSURE SENSOR + INJECTORS, OLD INJECTORS NOW REFITTED ANYBODY ANY IDEAS ?