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Erratic temp gauge - read FAQ's - a bit confused ...?? 700 1992

My guage was also erratic, I traced the fault to the sensor connection. This is one of those two pole "D" shaped Bosch connectors. They are used all thru the car but I never found a local source for them (I have more sense than to try the Volvo dealer with their high prices). So I repaired my old connector using female bullet connectors and some rubber hose for bushing/insulation within the old "D" housing. It has been working fine since, even made it through an engine rebuild/removal without going bad. I would look at this connection first, I know it is in a difficult place to work on (under the intake manifold) but I believe it is your problem.






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