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Re: Tach not always working ..?
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I have a new tach sensor with taxes it was $99.80CDN but I didn't put it in yet ... The sensor in it is less than a year old ,and tests 2530 ohms (good is 2000-3000 ohms) .. I checked the firewall wires cleaned some with contact cleaner and put dielectric grease on them .. Also cleaned the wires on the back of the dash assy ,Ford made a cheap circuit board when they made that it's just flexable plastic.. Anyway it's working now but it worked sometimes anyway so I guess I'll have to watch it and see if it stops working again ..
I have some Ford paper manuals & CD manuals they tell how to test tach but they don't go far enough in breaking the tests down..
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My bet is on the tach sender - been down that road before. Now as for the flexible circuit board being cheap... you got that backwards... I worked in a factory that made PCB's and the flex boards are actually more durable over the long term in a much boarder range of climates and environments plus a flex board cost TONS more to manufacture... So you should be impressed that Ford actually spent the extra money and used logic to choose the flex - this is not the norm for ANY of the big 3
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Travis
Will Work For Diesel Fuel.
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