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Old 03-07-2012, 10:58 PM   #1
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Malfuntioning Tachometer

I have a 1992 LX 5.0. When I turn the car on, the tachometer rises up to about 4000 rpms and stays there. Even while driving, the tach stays at 4000 rpm and hardly moves. Any ideas what's causing the problem?
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Old 03-08-2012, 01:24 AM   #2
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Re: Malfuntioning Tachometer

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I have a 1992 LX 5.0. When I turn the car on, the tachometer rises up to about 4000 rpms and stays there. Even while driving, the tach stays at 4000 rpm and hardly moves. Any ideas what's causing the problem?
Your tachometer is shot.
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Old 03-08-2012, 09:36 AM   #3
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Quote:
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Your tachometer is shot.
Now you have an excuse to go buy an auto meter
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Old 03-08-2012, 10:15 AM   #4
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Is it possible to change out the factory tach without replacing the entire instrument cluster?
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Old 03-08-2012, 12:51 PM   #5
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I have the same issue but with my fuel gauge it goes all the way past full
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Old 03-08-2012, 01:00 PM   #6
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Re: Malfuntioning Tachometer

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Is it possible to change out the factory tach without replacing the entire instrument cluster?
Yes, I believe you can.

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I have the same issue but with my fuel gauge it goes all the way past full

If only the fuel gauge acts up then it is likely just the fuel gauge or sending unit in the tank..
If they all act up there is an adjustment on the back of the gauge panel.
Read in your Chilton's manual on how to locate and adjust it.
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Old 03-08-2012, 05:14 PM   #7
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I'm guessing its the sending unit then because the gauge works normal it just goes all the way passed F and stay there
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Old 03-10-2012, 01:56 PM   #8
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Re: Malfuntioning Tachometer

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Is it possible to change out the factory tach without replacing the entire instrument cluster?
you can replace just the tach.. the cluster splits into sections...

2 gauge sections..

tach
and speedo

be sure the tach u get is for your year car. i think 89 or 90 the clusters changed a bit. at the bottom corner. u can trim it with tin snips or a grinder. its just the corner, and its not visible when installed.
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Old 03-10-2012, 03:23 PM   #9
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Thanks everyone for the info.
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