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Tachometer issues

1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Tachometer issues

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Old

Feb 25, 2014 | 02:31 PM

#1

86diesel

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Tachometer issues

I have a 1986 F350 with a 6.9 liter diesel and a C6 tranny. The tach recently started jiggling real quirky. Sometimes it'll work OK but mostly not, up an down. Anybody identify this problem and advise how to fix? Thanks

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Old

Feb 25, 2014 | 02:47 PM

#2

Franklin2

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From: Virginia

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Check the wires on the sensor. It's up front on the engine and reads the teeth on the gear that drive the injection pump.

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Old

Feb 25, 2014 | 04:32 PM

#3

86diesel

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Thank you Dave, I'll take a look and see, Bill

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Old

Feb 25, 2014 | 06:45 PM

#4

Eddiec1564

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From: Arcadia, Fla

Also read up in the How-To and FAQ sections. There are a few threads about the tach's acting up and fixes there.

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Old

Feb 25, 2014 | 08:27 PM

#5

86diesel

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Thank you, I'll do that too, Bill

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