CA18DET - Rough start, jumpy idle after acceleration

[linkage]

Hey guys,

Im having a issue with my CA to there point where, when i start the engine it likes to jump up and down on the idle (sometimes stalling all together)

Then once im on the road there seems to be a lack of power when accelerating and if i accelerate too high when my car comes to a stop, my car likes to go up and down again with the idle, to the point of which it will stall if i do not put my foot on the brake and accelerator at the same time to keep the revs up.

I have changed all 4 coil packs and plugs and Fitted a few AFM's

I cant seem to loosen the screws on my AAC valve to clean it and i have not as of yet replaced my O2 sensor.

I have checked my ECU for trouble codes and all that came back was a 55 (no issues code)

My Boost gauge reads -16 to -17 and hasnt changed since i got the car so i was thinking it wasn't a vac problem?

I have researched my issue with my ca but cant seem to find an answer, I did think it would be my AFM due to me blowing one out about 18mths ago and having to replace it and when that went it did like to stall alot, but i have replaced this many times with no change in the issue i have currently.

Could this be an issue with my injector? or maybe something im jsut too dumb to see?

Also i have noticed a increase of sound coming from my exhaust but that might be jsut due to the fact my engine is running rough on idle and revs etc...

Any help would be great,

Thanks in advance

EDIT: Also I forgot to mention, When i did replace my plugs they were white (too hot)
Modified by linkage at 6:52 PM 9/28/2009

[Klits562]

could be a vac problem my KA did alot of what your describing when i had bad vac leaksCheck your IACV also idk where it would be on a CA though.Also you can try posting in the CA engines thread that might help too as its more CA specific.