Had this happen on my Nissan, and now on the Mazda. On the 240SX, a friend
said I was driving down the road with my reverse lights on. I found two
switches on the tranny, swapped them and the lights were good. The other
switch was directly opposite the reverse switch, so I figured ...

Well after replacing broken timing belt on 1988 929 I thought I was OK.
Good compression tests, engine runs.  Good power on the road.  I thought
that I was very lucky not to have any damage.
BUT its now idleing at about 2500 to 3000 RPM even when warm.    Any ideas