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SOLVED - Engine coolant temp sensor 700 1990

posted by  Brick Skinner on  Fri Aug 16 12:06 CST 2013
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last visit: Fri Jun 13 13:31 CST 2014
[RELATED]

I get the cookie.

Problem was the wrong sensor. Brand new but still wrong.

TIP: When your ECT sensor goes bad, don't opt for the cheaper AutoZone brand. Find the OEM Bosch unit or go to Advance Auto for a suitable alternative. The correct one is hard to find and much more costly but its the only way.

The AZ unit has a blue connector while the correct ones have a black connector. Apparently there are two NTC thermistors crammed into the sensor that provide data to the LH Jetronic and Ignition computers respectively.

Happy days!
--
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