ST202 3S-GE Engine dies on idle and after connecting TE1 and E1 Options

[Ariel]

Hello,

I've got serious problem with my Celica ST202 1999, 3S-GE engine with JDM instead of EU ECU, removed EGR.
When the engine is cold, just after start I have to push the gas for some seconds - if don't, engine will die.
When the engine is hot, and I reach traffic lights or have to stop I have to push the gas againt, because rpm will fall near to zero and sometimes the engine dies again.
When I would like to check my car for errors, in test mode, when the engine is running, few seconds after connecting TE1 and E1 terminals my engine dies (I don't touch gas nor do anything else).

What have been checked:
- ECU has been replaced again to EU
- throttle body has been removed and cleaned
- IAC has been removed and cleaned, inspected with manual
- TPS - inspected with manual
- temperature sensor from airbox - inspected with manual
- spark plugs changed about 20000km ago
- ignition - set with light probe
- all wirings with underpressured air (sorry, i don't know exact english word)

and the problem still isn't gone.

My clues:
- oxygen sensor?
- car catalyst?
- distributor?

I would be glad If anyone has simillar problem and know the solution.

Greetings

[njccmd2002]

what he said