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240 oil pressure sender flaky 200

posted by  thaywood on  Sun May 5 04:10 CST 2002
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last visit: Sun Jun 29 08:38 CST 2014
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I installed an oil pressure gauge from a junker in my '87 240. The sender seems to have a dead spot below 3 bar - the gauge reading is stable at 3 bar and above, but once the engine heats up the idle pressure reading gets flaky: it pegs above 5 bar and/or jumps around. I checked the sender using compressed air and an ohmeter, it looks like there is a dead spot (infinite ohms) in the middle range.

Is there a way to fix the sender or is it shot?

Thx,

Terry





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