My getz 1.6 model 2005 has a hard starting problem, and i have changed the crank sensor, air filter , petrol filter and spark plugs but it is still doing the same problem .

Computer not giving signal

sounds like crank sensor, but unplug mass air flow sensor on air filter tube see if it changes condition

crank / cam sensor faulty

Some info about the car can be found
The Korean Car Guide Hyundai Getz Part II Engine


The failure to start could be due to the Crank Timing Sensor. The sensor not working will stop the computer from knowing when the spark should be activated and the injection of the fuel should take place.
I hope this is the problem. and that you can find
This is only my opinion and It seems to fit the problem posted

check the seal at the tank may be leaking air.

check for l.oose /damaged wires to cam/ crank position sensors

My Vauxhall (Opel) Zafira 2004 1.8 liter 16V Petrol Auto
had COLD START problem; cold engine does not start no
matter what! I have changed the following parts, one after
another:
1. New Coil pack
2. New Spark plugs
3. New Battery
4. New Mass Air flow oxygen meter
5. Air filter
6. Oil filter
7. Engine oil
8. Fuel filter
9. Premium Petrol
10. Engine coolent water sensor
Still the same problem. Then changed 'Crank sensor'. And
now the car starts fine without any issue!!
Faizur Rahman <[email protected]>

you need to replace the crank position sensor .

mass air flow sensor in the air induction pipe between the filter and the manifold .

check the crank sensor. no signal from the crank sensor causes a no spark condition. best way to check is to put a scanner on and check for rpms.
the crank sensor is differnt from the cam sensor