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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 01-08-2008, 04:28 PM
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philbax philbax is offline
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Tach not working !!!

I'm trying to figure out why my tach is not working correctly. When I start the engine up 351w EFI 87 F350. Tach acts like it wants to work as it goes up to around 600rpm and stays, then when I push gas peddle down tach goes to 0 and lower. Back ground : replaced 351w carb engine with 351w Efi changed all wiring under hood plus all wiring in cab, I kept original gauge cluster in truck but I do have a replacement from doner 351w EFI truck if there is a difference in them, all other sensors gauges seem to be working correctly. Any help would be great!
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