So you've given us more information to go by now. It would have been nice to have that when you posted before so it would be easier to distinguish that. You said you had another ECU a couple post ago and that you would try that. Did you try it out and see if it made a difference? Parts can be bad from Aftermarket retailers so there is a possibility that you picked up a bad one. You could check out the TPS or IAC because one of those could be cutting in and out periodically causing your problem. Other than that, I am about out of what I think it could be.

Oh do not let people correcting you get to you. I did it to prevent people from ragging you in your future posts. I do agree with you though, it has been brought to your attention so everyone does not need to be posting unless they are trying to help. One person pointing it out is enough.