I've been looking around the website looking for anyone else having the same issue and I guess i'm just not realizing my situation is the same as anyone else as I'd hope I'm not the only one with this issue. So, I apologize if this has already been gone over.
I have a '92 LS400 with 270k miles on it and I have had zero problems with it other than the AC died on me. When we bought the car a few months ago my stepdad drove it home and mentioned to me an issue where all of a sudden the accelerating just stopped. It was almost as if pressing on the gas was slowing the car down, literally. I never noticed it and so we never had it checked out (doh!). That's been a while back and the problem never resurfaced until recently. I did an oil and oil filter change not long ago and the car was running great - as was expected after the oil change. However, a few days ago the problem came up. What's happening to the best that I can describe it is this: I'll get in the car, drive, no issue, get on the interstate, no issue, get up to speeds of 85, no issue until at any given moment my RPMs and speed significantly decrease. There is absolutely nothing consistent with when it happens. I've tried to pay attention if it's when I'm going fast, going slow, turning, accelerating, decelerating - there is no rhyme or reason that I can see. Also the car NEVER has an issue starting, doesn't overheat, and it idles perfectly fine until the problem takes place and then it idles very rough revving from 1.5k rpms to 3k rpms.
Any help would be greatly appreciated. Thank you.
