Couple of quick ideas before the experts chime in.
- These problems might not be related.
- Any time an electrical problem shows up, it seems that the trunk wiring harness is the first thing to check.
- Regarding the "stuck" throttle, does it really hold _exactly_ 52 mph or 73 mph or whatever (as cruise control would), or does it just hold the approximate speed for a little while? My thought on the auto-revving when in park (based on other cars I've had) is that it could be caused by the Idle Air Control Valve (not sure the Lexus calls it this) sticking. These are often near the throttle body. You can try to see if tapping it with a wrench while it is revving changes the revving (e.g., stops it). If so, it may be ~clogged internally, and the tapping allows it to move. In both cases I've had with this problem, I've found that simply removing the IAC valve and cleaning it out (no need to disassemble it) with brake cleaner (any similar solvent should work) fixed it.
Good luck, Ed
Thanks for the reply.
From what I could tell it was staying the same speed. In fact the first thing that came to mind was that I was in cruise control, the light wasn't on though, and I even clicked the button to see if it wold stop the problem.
I saw the trunk wiring harness thing on a few threads too, I'll check that out now.
Thanks for the input, any other advise is welcome too.
Rob