Tachometer problem - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 11-29-2012, 07:25 PM Thread Starter
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Tachometer problem

I bought a original VDO tachometer from a junkyard for my volvo 240 diesel.
But its on 1500rpm on idle and is at 4000 in 80km/h in 5th gear, and it will easy reach the red field that begin at 5500 rpm.
So it seems the tachometer is lying with about double what it should be. I have tried to attatch it to a 740 with the same non turbo engine and its the same so it cant be my generator. so is the tachometer broken, it only reach 6000 rpm so im pretty sure it is for diesel.

Anyone else had a similar problem?
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post #2 of 2 (permalink) Old 11-30-2012, 03:13 PM Thread Starter
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Nevermind fixed it, it just had to be calibrated.
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