Ford Truck Enthusiasts Forums
Older, Classic & Antique Trucks
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
Tachometer issues

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

Tachometer issues

Reply Subscribe

Search this Thread

Old

Feb 25, 2014 | 02:31 PM

#1

86diesel

Thread Starter

|

New User

Joined: Jan 2014

Posts: 17

Likes: 0

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

Reply

Old

Feb 25, 2014 | 02:47 PM

#2

Franklin2

Moderator

Joined: Jan 2001

Posts: 56,992

Likes: 2,741

From: Virginia

Club FTE Gold Member

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.

Reply

Old

Feb 25, 2014 | 04:32 PM

#3

86diesel

Thread Starter

|

New User

Joined: Jan 2014

Posts: 17

Likes: 0

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

Reply

Old

Feb 25, 2014 | 06:45 PM

#4

Eddiec1564

Cargo Master

Joined: Mar 2007

Posts: 2,935

Likes: 34

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.

Reply

Old

Feb 25, 2014 | 08:27 PM

#5

86diesel

Thread Starter

|

New User

Joined: Jan 2014

Posts: 17

Likes: 0

Thank you, I'll do that too, Bill

Reply

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

tacho calibration?

southern-old-bold

Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

3

Nov 4, 2014 06:57 PM

deano-was-his-name-o

Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

14

Oct 17, 2010 03:03 PM

89 Tach / Tranny Troubles HELP!!

440TNT

Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

5

Feb 14, 2008 11:55 PM

tach

wls

Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

5

Jun 3, 2003 06:11 AM

6.9 diesel tach

Distinctive Dave

1999 - 2003 7.3L Power Stroke Diesel

3

Dec 14, 2002 02:32 PM

Reply Share

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 01:11 AM.