I have a mazda bravo 2 wheel drive ute I can start car and press in clutch place in gear and release clutch and take of but then can change into next gear and with foot on clutch the car still moves

the ecu has to come out of the
same year and number as the engine and drive line
Ford Courier/Mazda Bravo 1994 2.6 petrol 4x4 B2600
source from
ebay
a 4x4 wrecker
an good auto electrican can referb your original
this is usa but might be a seller some where in australia

edit I added image of a G695
http://www.ebay.com/itm/OEM-91-92-93-MAZDA-B2600i-TRUCK-ENGINE-COMPUTER-CONTROL-MODULE-ECU-G618-18-881A-/191653050869

you may have to be more specific as to the model mazda you have as all my information says that only canadian mazda utes had a cable clutch
All others run hydraulics.
If you have a problem with a cable clutch then I would be not adjusting it but replacing the stretched cable.

there is a clutch release issue here. clutch throw out arm adjustment, air in the system and if you have just replace the clutch, clutch plate in the wrong way round and the hub is hitting on the fly wheel bolts.

that is what we called dragging when you replace the clutch did you check the pressure plate? it tends to worn the plate with the lining so when you replace the lining it touches an uneven surfaces thats why it hesitates if its not too late when replacing the clutch include the pressure place release bearings and all the knick knacks that goes with so you'll a have a trouble free clutch

it needs to have the air bled from the hydraulics properly

No!!!! The motor has oil filter.Look from the top of the motor.It is right there.Under the manifold.Hope this helps

The one item I would suspect is the through-out-bearing not completely disengaging the pressure plate from the fly wheel. If the vehicle is in neutral and you slowly depress the clutch and release it do hear a singing or whining sound? Since you cannot adjust the clutch any more the through-out-bearing is the component which moves the pressure plate from the fly wheel to stop the power from the engine to the transmission. It is difficult to shift when the engine is on because the fly wheel is still engaged and powering your transmission.

Sounds like transfer case issue if 4 wheel drive works and 2 wd does not. Clutch slippage would be worse in 4 wheel drive more than 2 wheel drive, more to push.

the blower motor has no affect on the AC system,
start the engine and turn on AC and watch the AC compressor to see if clutch engages,if it doesn't the system isn't full,if you are correct the clutch should be engaged and should quit when you change heater speeds,

To reduce clutch disc/plate problems, avoid riding the clutch whilst driving, ie having ur foot on the clutch pedal when the engine is in operation, especially wqhen the vehicle is in motion. You see the clutch disc is sandwiched between the flywheel of the engine & the pressure plate. When the driver presses the clutch pedal, the sandwiching of the clutch plate is released, so therefore no drive is being transmitted from the engine to the road wheels. This gives an effect as if the vehicle is in neutral (engine can be revved, with no movement or propulsion of the vehicle). When the driver releases the clutch pedal, the clutch disc is now sandwiched tightly causing the drive to be transmitted to the road wheels which will now cause the vehicle to be propelled.

Clutch discs are only replaced when there are problemes with clutching in and changing gears. After constant pressing of the clutch, the asbestos material on the clutch disc after a period grinds down (clutch disc becomes thinner), which in turn will reduce friction characteristics when all the elements are sandwiched. This causes a slipping effect, preventing the drive from being transmitted to the road wheels efficiently. This causes other problems such as high fuel consumption, erratic engaging of gears, hard selecttion of gears, heavy vibration of the vehicle, stalling; just to name a few. In most cases an unusual smell of the clutch disc is observed.

Also just by resting ur foot on the clutch pedal while engine is running can be dmagaing too. You see the clutch release bearing rests on the pressure plate, so when the clutch pedal is pressed by the driver, there is a degree of friction being placed on the bearing because the pressure plate is always rotating with the engine. The clutch release bearing is stationery until the clutch pedal is pressed by the driver, which sends it into the moving pressure plate, so less pressing on the clutch pedal the less friction between the bearing and the pressure plate. Only operate/press/place foot on the clutch when necessary