Technical mis -reading instruments

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Technical mis -reading instruments

lebesset

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May 25, 2009
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on my recently acquired 2001 hymer , the fuel gauge works correctly , but it appears that the tacho and temperature gauges do not

until the engine is almost up to full running temperature the gauge doesn't move ...it then reads a quarter of the way up the dial

the tacho reads 500 revs at tick-over ....maybe I am wrong but experience suggests to me that the real revs are about the 750 which I understand is correct for a 2.8 id TD engine

any ideas anyone?
 
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