nissan fb14

here is a description of my car's problem...

what happens is its switches off at times...sometimes it starts again within a few minutes, other times it takes longer....betweeen 20 mins to over an hour.
i have had it checked here by several technicians...unfortunately no one is able to pin-point the problem...i had it tested...it only picked up the Coolant Sensor...i have replaced the same but still have the problem.

Unfortunately, sinnce my car has an EFI system and local expertise here in Fiji is limited, i need help!

I've been told that the problem might be the Air-flow Sensor!

Details of my car are:
Description: Nissan Sunny
Engine # GA15 - 6274320
Year of Manufacture 1995

HELP!

dear friend
i believe your mechaninc should check the (temperature cooling sensor) beofre the airflow meter. im quite certain its that sensor giving you problem.

Dear Frnd,

I m looking to buy a Fb 14 super saloon 1997 model....What can u say about my selection with your experience....

Also can I know the difference between fb14 and b14 ???

Appreciate if any can reply this....