uno not starting

hi my uno turbo mk1 is not starting,could someone please tell me which one is the tdc sensor?.i know theres 2 sensors one is under the airflow meter on the gear box and the other one is on the left side of the engine near the fan belt,both sensors look the same so which one is the tdc sensor?.im guessing
this is the problem why its not stating up.should i change both sensors?

The tdc sensor is left hand side of the engine, above the crank pulley, near the alternator belt

cheers mate.so whats the other sensor called the one under the airflow meter?.which one do u think i should change first?

Flywheel speed sensor if the one in the gearbox and a different length to the crank one. Have you done all the basic checks in the book?, is your fuel pump running etc?

hi.yes ive checked all the basic stuff,dizzy cap,rotor arm,coil leads,airflow meter,all pipes also fitted new ht leads with new plugs.i had a look at the fuel pump it looks old and rusty like its never been changed before,but how do i check if its working right?.the car had a slight miss fire time to time goes away
then comes back,thats making me think its the tdc sensor.