1993 Mercury Tracer Mystery sensor

1.9L • 4 CYL • FWD • AUTOMATIC
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DMCMSR
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  • 5 POSTS
I have rebuilt this 1.9L engine and upon disassembling it I came across a random bolt stuck in a threaded hole on the side facing the firewall. The bolt does not belong there. I would like to put the correct sensor back, but I do not know which sensor it would be. From wires in the area, only 1 that currently does not plug into anything. It will be a single post sensor on the middle back side of the engine. Anyone know of what should be there??
Jul 11, 2015 at 8:08 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
it may be item 17 engine coolant sensor or item 6 cylinder identification sensor
Jul 12, 2015 at 1:42 AM
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