Why did they do that?

[Rich <mrich@xxxxxxxxxxxxx>]

    I'm still troubleshooting the '84 528e (manual) for whatever is
causing the rich fuel mixture, black smoke, hesitation under load,
occasional increase in idle, and fuel loading-up at rest.  Today I
pulled the ICM and performed the tests recommended in the FAQ by Sam
Chien-shin Lin.  I immediately noticed that pin 11 (coolant temp sensor
lead) was removed from the connector and taped off to the ICM wiring
harness.  I am curious as to why this may have been done.  I could be
wrong , but it seems as if instead of fixing the problem, the previous
owner or mechanic put a band-aid on it.

    I tell you, everytime I pull out the tool box I find something new.
Nothing is ever obvious to this untrained eye, but luckily I am
persistent.  First, I find the Oxygen sensor disconnected, now this!  I
tested the resistance between leads 4 and 11 and found '0' resistance.
I have yet to locate the sensor at which  this lead terminates in order
perform further tests, but I was kind of hoping someone knowledged in
the tricks of this trade could intervene in the meanwhile.

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