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Error 2142 from ECU...

     Checked Scott's web site:

     Code 2142 (knock sensor) would be displayed as follows:

     So you need to find your knock sensor.  If it is a single knock sensor
engine, it will be on the spark plug side of the engine, about in the middle.
A single wire comes out of it and heads for the firewall.  It should be
plugged into a plastic connector on the firewall.  There have been several
comments on the list about these things being sensitive to handling, so work
gently with it.