jimny drop revs and shut down after warm up

Hi Guys,
I'm the owner of an 2005 (not vvt) M13A automatic Jimny.
one morning i just started it up and went on a short drive, after worming up the car started droping revs (while the car was not moving), when i accelerate, it behaves fine, but when i'm stopping the car drops revs to about 500.
now it became worse, it has a hard start (wouldn't start without pushing the acceleration pedal).
I had one error code which determined the cam position sensor faulty, replaced it, didn't help.
Then the o2 sensor error apeared once, i've erased it and it wouldn't come back again.
I've replaced the whole intake system with it's sensors (had an extra one in the garage), no resaults, checked all the connectors, everything looks fine, got the EGR valve out for a check, fine...
Basically i'm out of ideas...
I have 2 o2 sensors, one is located on the middle exhust and one on the out manifold of the engine, haven't checked them yet for resistance but i'm really not sure it has something to do with it.

it's important to mention that when the car is cold (morning start) it's OK (only has hard starts) untill the car worms up and all the mess begins.

well if anyone want's to know what was the problem, it's the EGR Valve, the valve was jamed, i opened it, cleaned it up and now everything works fine!

Thanks for the up-date, pleased you were able to sort it ..................