Problem with dc2r (different symptom)

[teaseR]

need some help for my dc2r.

dont know if its coincident or what but while i was driving today something metal hit me from under the car. i felt it under my feet. dont know if its from the engine that dropped off but have check around the engine bay... nothing looks out of the ordinary.
now the car idles really bad asif its going to stall (~500rpm) and on take off its really sluggish (jerks ~ 3400rpm) pretty much like its missfiring.

have platnum plugs but havent replace them ~40 000km

car is tune with e-manage blue. has been tune over one year.

most recent thing i did to the car was topped up oil this morning(motul 8100)

can it be the piggyback shit itself? or plugs gave way

need the car for work so please have some sugestions.

thanks in advance.!

after afew days with driving i had a chance to have a look at it.
it idles fine. IACV was cleaned out.

but now on a warmed engine ~1800-2000rpm whether its parked or driving it chocks/jerks/flat but if i hold it there when park the engine stalls. anything after that drives fine. can vtec still.

DOES NOT HAPPEN WHEN COLD.

we tried fuel pressure, map sensor off a b16a (same item number), dizzy rotar, check leads to see if its crack causing to fire on walls, removed emanage. nothing has dropped out from engine bay.

No engine code is throwing out.
ABS has code 17 and 61

also car is running rich therefore could be map or o2 sensor.

Some suggestions were:
- Map sensor
- o2 sensor
- bad fuel