I removed the central air distribution plenum and  the intake manifolds and
replaced:

            the  injector seals on all four injectors,

            the  rubber connectors which join the intake manifolds to the
central air  distribution plenum,

            the  vacuum line for the fuel pressure regulator and the rubber
vacuum line which  connects the throttle body the tube connected to the
charcoal filer valve.

I started the engine and it now runs at a normal speed (about 950 RPM) if I
 disconnect the temp II sensor. I am going to check the wiring from the
temp  II  sensor to the ECU to see if the is a short to ground or a break in
the  wiring which would affect engine speed.  The temp II sensor reads normal
resistance at both the high and low temperatures as specified in Bentley.

Does anyone have advice on how a broken wire or a short to ground for the
temp II sensor would affect engine RPM?

Thanks in advance,

Rico Dagastino
Memphis, TN