Intermittent tachometer

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Jul 30, 2006 | 06:03 AM

bterry

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Intermittent tachometer

I finally got my '92 IDI non-turbo home, and it runs good. However, the tach only works intermittently. I presume it's an electronic tach, but have no idea what or where it gets hooked up to. Any ideas on where to start.

Jul 30, 2006 | 07:59 AM

tjc transport

i ain't rite

Joined: Mar 2005

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From: Marlboro Mental Hospital.

the tach sensor is the big nut on the driver side of the cover in front of the injector pump. make sure the wire connections there are good and clean.
here is a overall shot of the engine for reference.
http://i41.photobucket.com/albums/e2...nginefront.jpg
and here is a closeup of the tach sensor
http://i41.photobucket.com/albums/e2...tachsensor.jpg

Jul 30, 2006 | 09:12 AM

saengjwi

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I have this same problem on my 92 also. The tach stays at the resting postion when I start up, after the truck warms up it works fine after that.

I will try to clean the sensor up now that I know where it is.

V/R
John

Jul 30, 2006 | 05:33 PM

bterry

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Thanks, tjc just the info I was looking for. Does this sensor go bad, 'er is it commom for them to go bad? The connections seam fine. I plugged - unplugged it a few times and it's working, but that's not a sure indication it's fixed just yet. I'll put some miles on it and see.

Jul 30, 2006 | 06:19 PM

tjc transport

i ain't rite

Joined: Mar 2005

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From: Marlboro Mental Hospital.

well.... i have heard they go bad, but my 88 has never given me any problems.
and the 89 i sold to a friend in 96, and the 90 i sold to another trucking company in 99 still have their original sensors also.

Jul 30, 2006 | 06:38 PM

Bioford

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From: California Central Coast

The tach on my 87 is funny, when I put the left turn signal on the tach starts moving in sync with the turn signal, only at idle though. Any ideas about that?

Jul 30, 2006 | 06:55 PM

lartross

More Turbo

Joined: May 2006

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From: Cameron, Ok

Mine did the same thing and my transmission guy told me it was important to the tranny operation and I bought a sender and a throttle position sensor and he installed and adjusted them when he rebuilt my tranny. If you have an e40d, it's pretty important to the correct shifting of your tranny.