tach not working

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Jan 7, 2007 | 08:03 PM

davelong667

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Joined: Feb 2004

Posts: 152

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From: Halstead, KS

tach not working

Ok guys, Ive exhausted the forums and most of he ones about my problem are incomplete, most of the topics end midway through just as the answer is about to pop up, and no one has answered for 2-3 months...... SO.....
My tach is not working, and I tested my rpm sensor. I did read that the sensor should read 2-3000 ohms dc. well, mine reads 2000 ohms. Yet my tach is still dead. I tried cleaning the sensor with no progress. Is there something else that I should look at? Also.... i hear that, the tach not working affects the tranny's shifting. Is this also true for the C6? or just the E4OD? Thanks

Dave

Jan 7, 2007 | 10:27 PM

roamer37

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Joined: Dec 2003

Posts: 221

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From: Grosse Ile Mi.

Engine rpm is only needed on e4od. its is computer controled..
C6 is controled by throttle position and governor (vehicle speed)
Your tach could be a lot of things bad tach or wiring between the sensor and the dash or my bet the sensor is bad even with the correct ohms... in 200K I am on rpm sensor number 5..

Last edited by roamer37; Jan 7, 2007 at 10:31 PM.

Mar 5, 2007 | 06:48 PM

dyoungen

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Joined: Aug 2006

Posts: 1,049

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From: Perry Georgia

Any idea where to get a sender unit reasonable (cheap)?

Mar 7, 2007 | 07:50 PM

rockcrawlerdude

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Joined: Jun 2006

Posts: 146

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dealer has them for $60 .. replaced mine and the tach and my E4OD tranny work good now...

Mar 7, 2007 | 09:06 PM

PLC7.3

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Joined: Nov 2004

Posts: 5,638

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From: Manitoba

C6 uses vacuum to work so check the vacuum system, especially the 48 oz juice tin for holes in the bottom.

Mar 8, 2007 | 06:11 AM

tjc transport

i ain't rite

Joined: Mar 2005

Posts: 65,569

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From: Marlboro Mental Hospital.

Quote:

Originally Posted by dyoungen

Any idea where to get a sender unit reasonable (cheap)?

call Ed at Y2kford parts, a F.T.E. sponsor. he has outragous prices, and beats most others price.

here is a link to his site.

http://campaigns.ford-trucks.net/cam...s&bannerid=156

Mar 8, 2007 | 07:17 AM

bigbubba87

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Joined: Oct 2006

Posts: 1,078

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From: New London, Mo

you have to but the tach and sensor togeather the one in my 6.9 with a c6 runs off the ip gear the one in my 7.3 with a 5 spd runs off of it too i was just looken for a tach for mine then talked to some guys and you have to either buy a tach and sending unit togeather or find another truck with em in it