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Jun 1, 2003 | 08:31 PM

wls

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Freshman User

Joined: May 2003

Posts: 38

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From: Mid-Mich

tach

My 92 f-250 diesel, has a tach that only will work for a couple seconds if and only when I accerate heavy, like I said just for a few seconds it will go to say 3000 and then back down. What does the tach run from, could this be a easy fix? loose wire or something like that? thanks

Jun 2, 2003 | 01:01 AM

RCrawler

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Joined: Dec 2002

Posts: 3,594

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From: Southern Oregon USA

tach

The sensor is on the top of the front cover to the right of the injection pump. It is a magnetic sensor that takes pulses from a toothed ring on the pump drive gear.

Jason

Jun 2, 2003 | 08:23 AM

argve

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Joined: Jun 2001

Posts: 295

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From: Fort Wayne, IN. USA

tach

You can try to clean the sensor but if this works it seems that most fail again in a short period time, then most guys just replace it and never look back.

Jun 2, 2003 | 09:13 PM

wls

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From: Mid-Mich

tach

If I can find it, I'll try cleaning it. Thanks

Jun 2, 2003 | 11:01 PM

argve

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Joined: Jun 2001

Posts: 295

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From: Fort Wayne, IN. USA

tach

It's located just behind and slightly to the right of the oil filler cap. It has two wires coming from a "BIG NUT" sits at about a 60 degree angle.

Jun 3, 2003 | 06:11 AM

wls

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Joined: May 2003

Posts: 38

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From: Mid-Mich

tach

Quote:

Originally posted by argve
It's located just behind and slightly to the right of the oil filler cap. It has two wires coming from a "BIG NUT" sits at about a 60 degree angle.

Thanks should be able to find it, thanks again

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