Hi mate

Ive done the 1.8D to 1.8TD swap on my mk3. Mine didnt have an ecu as a 1.8D just basic wiring so you dont need an ECU run it. The only change i made was to bypass the fuel pump immobilizer. Not sure where the ECU would be on your car if it did had one. If theres no ECU dont worry about the air flow meter. As for the Egr valve i dont have anything on it either and it runs ok. Where have you tried to connect it to? Does it say 1.8 or endura de on the rocker cover btw?