Fixing my speedometer gauge...

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Jan 21, 2011 | 07:41 AM

calgutie

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Senior Member

iTrader: (3)

Joined: Jan 2011

Posts: 842

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From: Oxnard, CALI

Car: 1984 Z28

Engine: 5.0 L (Carbed)

Transmission: 5-Speed

Axle/Gears: Lazy 2 check

Fixing my speedometer gauge...

All of my gauges on my dash seem to not be working properly. first of all I think the speedometer gauge is off because it says i am going 80 but it feels like 90, and my gasoline gauge marks at half a tank and I just filled up in gas. I just wanted to know how to fix most of the gauges on my dash especially these two main ones, thanks!

Jan 21, 2011 | 09:39 AM

NINÅ

Supreme Member

Joined: Jan 2006

Posts: 3,341

Likes: 10

From: Mooresville NC

Car: LOWERED ♦ CRIMSON METALFLAKE

Engine: ► 400 KUBES ◄

Transmission: 765R4

Axle/Gears: EATON POSI 4.56

Gage Rage

You can check the speedometer with GPS or a scanner.

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Here’s how to test the fuel gage.

Remove the sender wire going to the gage.

Tape the bare end of the sender wire and put it aside.

Use a potentiometer with a value of 90Ω or the closest you can find.

Connect one end the potentiometer to the gage from the location you removed the sender.

Connect the wiper of the potentiometer to ground.

Turn the key to RUN.

Slowly adjust the potentiometer from 0Ω to 90Ω.

If the gage is bad it will exhibit the problem you have.

If the gage is good it will display a smooth transition from one end of it’s range to the other.

Therefore the problem is with the sender or wiring going to it.

◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
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I Don’t Mind Wreckin’ On The Track, No Paperwork To Fill Out

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Jan 21, 2011 | 09:45 AM

JamesC

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Posts: 19,282

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From: Lawrence, KS

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: Fixing my speedometer gauge...

Where the speedo is concerned, do as Nina suggests because "feels" like isn't very accurate. Should there be a problem, check the link to follow:

https://www.thirdgen.org/forums/inte...eedo-woes.html

JamesC