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Sensors under manifold and a mystery plug?!? 700

posted by  ghop83 on  Tue Dec 9 09:18 CST 2008
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last visit: Tue May 18 10:28 CST 2010
[RELATED]

I just ran the codes on my 91 745 today and came up with: Temp control sensor, O2 sensor & MAP pressure sensor. At lunch today i was checking around the engine to see where they are and noticed 2 sensors mounted beneath the intake manifold. Both looked to be connected by a black wire then going to a plug near the front of the block. The plug has nothing going to it so i looked all around for a loose plug and could find nothing. Anyone know which sensors these are and what plugs into this plug? I'm wondering if whatever it is that is unplugged may be causing my engine codes. Please see pics. Thanks in advance!
Greg

Sensor 1: sensor 1


Sensor 2:
sensor 2

Mystery plug:
mystery plug
--
91 745 & 85 244 GL






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