I just bought an 83 280zx with the digital dash.
The tach and other read outs work fine. The problem
is the speedometer only reads 0.  So there is an
image there but not the speed.

Someone told me the other day that drivers should always turn off their car
or truck's A/C BEFORE shutting down its engine. He said that this would lead
to longer compressor life. I had never heard of this before and was
wondering if this is even true. Anyone out there know of a ...