I posted this some time ago. A lot of folks advised to take it in. Given that it is an intermittant problem. I did not just want to give it to the dealer for repeated joyrides until I got lucky and they could duplicate it.
It happens maybe once, twice a week, lasts for maybe 10 minutes.
I have pinned down some more syptoms/indications.
1. No apparent trigger, outside temp/engine temp, full throttle runs, low power runs, I have seen it happen under all variations.
2. At some point, with the trans not engaged (clutch in, in gear, clutch out, in neutral) the engie will rev to exactly 3k.
3. As long as I do not engage the clutch, the engine will stay at 3K.
4. Until the car comes to a complete stop. Then it drops to normal idle RPM immediatly. (I see a speed sensor/ECU tie in here)
5. If , while it is happening, I engage the trans, the load will drop the rpms down to the 2.2 - 2.3 K range and act like a cruise control.
On a level road, 5th gear will maintain exactly 57 mph.
6. It happened during lunch today for the longest time ever, through 8-10 stops on the way home for lunch, continued after it was turned off while I ate lunch. After lunch, since it was still happening, I went straight to the dealer. Like an idiot, I turned it off while I talked to the service guy. Of course, when I took the mechanic out to the car, it refused to do it
He drove it with me for 10 minutes, the problem of course would not surface.
The service manager was interested, insisted it had to be the throttle plate sticking. When I mentioned that the idle would not drop until the speedo reached zero and only zero, he just kept insisting it had to be the throttle plate. I told them I would try and bring it in next time it happens, and not turn it off this time.
And no codes, ever.
Ideas? Comments, besides take it in.
