newbie has tachometer probs..

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Feb 25, 2007 | 11:04 PM

xjvince

Thread Starter

Mountain Pass

Joined: Jan 2006

Posts: 162

Likes: 3

From: oregon

newbie has tachometer probs..

at times my tach dont work or it will twitch around. then it will be fine for a while. where does it get its sgnal? what should I look for? I'm still learning what everything is under the hood.

I have a 94 IDI NA 5spd

thanks, Vince

Feb 26, 2007 | 02:22 AM

dwaymar

Senior User

Joined: Sep 2005

Posts: 306

Likes: 2

tach sensor on timing cover looks like a big nut with wires coming out of it

Feb 26, 2007 | 03:28 AM

tjc transport

i ain't rite

Joined: Mar 2005

Posts: 65,483

Likes: 5,542

From: Marlboro Mental Hospital.

this is your tach sensor.
there is a plug up the wires a bit. check the plug for a tight fit.

http://i41.photobucket.com/albums/e261/tjctransport/tachsensor.jpg

Feb 26, 2007 | 04:32 AM

PLC7.3

Post Fiend

Joined: Nov 2004

Posts: 5,638

Likes: 1

From: Manitoba

Quite often the wire covering will pull back out of the tach sensor and the wires will touch causing intermittent readings........

Ford only part Engine RPM sensor E5TZ-17B384-A about $50.

Feb 26, 2007 | 08:20 PM

catfish101

Posting Guru

Joined: Mar 2005

Posts: 1,701

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From: KY

The tach gets it signal from the injection pump drive gear. It is an analog signal. You can also check buy taking your sensor out get somebody to take a chishel or a screwdriver and swipping it across the sensor tip pretty fast. Get somebody to watch the tach while you wiggle the wiring around. You need to have the key on. If you are alone use a mirror and wiggle everything around while you swipe a iece of metal across the sensor..

Feb 26, 2007 | 09:09 PM

xjvince

Thread Starter

Mountain Pass

Joined: Jan 2006

Posts: 162

Likes: 3

From: oregon

thanks for the info, everybody. i'm gonna check it out first thing in the morning.

Vince

Mar 5, 2007 | 08:25 PM

jcruth

New User

Joined: Mar 2007

Posts: 11

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well now i know what that big nut with the cut wires is. and why my tach dont work. first diesel had it a week, drove home fine, hasnt run in a week,but im learnin and i got it to run for 30- 40 sec today..woot!!