Yogi

Well another update.... I replaced the O2 sensor and it ran fine for a couple of days. Was heading back home from a short trip and she started doing it again. I'll report back when I find something else, so as to help the next guy.

I've drove it up to 250 miles at one time and had no problems and then it would start doing it's stumbleing act. Like you said; when it was acting up, it seemed to have bad gas or not enough at WOT. Now it seems much more responsive and needs very little touch with the gas pedel to maintain hwy speed.

Thanks for the responce guys. I took the car to the dealer to check for any codes stored in the ECU and they found while checking for codes that the O2 senser was not reading right. It was well below what it should have been. By the way; there were no codes. I replaced the sensor and will see if that was the problem(I'm pretty sure it was).

That very well could have been the problem,but it was doing it under normal driving and not coasting and I don't think it would explain the lower rpm stumbles. The lower rpm stumbles happen more often and when it happens there will be a clunk to the drive line as power is lost and then reaplied. Also I have noticed that at WOT there seems to be a miss or it seems as if it's not getting gas, I guess you might call it "little quick surges".

02 Forrester, auto trans. Need help on this. It started stumbleing while the cruise was on (only once in awhile), and it would stumble after slowing down to where the rpm was somewhere around 2000-2500 and getting back in the gas. I took it back to my machanic and they could find nothing wrong. They did do a fuel system cleaning and the engine ran better for a while, about 250 miles before it started again. The car ran fine before the timing belt was replaced.