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Engine Temp Sensors 700 1986

posted by  jadnhm on  Tue Apr 25 07:11 CST 2006
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last visit: Tue May 22 18:03 CST 2012
[RELATED]

I am doing some tuning and have been running into what I think is a bit of a rich running problem.

Something I've been looking at/thinking about is the temperature sensors, but I can't seem to figure out what they're all for.

There are 3 temp sensors, as far as I can see.

#1 - under intake manifold, screwed into block ~ cylinder #3 - single wire connection to engine temp gauge in dash.
#2 - under intake manifold, screwed into block ~ cylinder #2 - single wire connection, I think to ECU
#3 - upper passenger side radiator - two wire connection, connected to ? (maybe for Auto Climate Control system?)


Any help in clarifying what each of these is for, and/or how likely they are contributing to my rich running problem, would be greatly appreciated.


Thanks.

-Joel








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    Engine Temp Sensors 700 1986

    posted by  Big Harry on  Tue Apr 25 14:14 CST 2006
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    last visit: Sun Sep 21 11:06 CST 2014
    [RELATED]

    The one under number 3 controls the fuel mix at different engine temps, and takes a 19mm socket, the one nearest the engine front is a mostly reliable sender for the idiot gauge, and the one in the radiator turns on the condensor fan. The last one I used to run my electric fans with a manual override.

    As mentioned below, you will find much good information in the 700-900 FAQs

    Regards,
    --
    Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles.







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