Tach gauge "sticking."

StangIt #1

Founding Member

Oct 25, 2001

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Washing the Car

Dec 22, 2003

#1

• Dec 22, 2003

• #1

The tach gauge on my '98GT seems to be "sticking." It works properly above 2K rpms, but below that, it bounces around at random intervals. For example, if traveling at 1500rpms, the tach needle will stick at 15, then jump to 17 and back to 1K. Other times, it will completely flat line. Generally, I can bump the top of the dash and the gauge will go back to normal, but it still isn't smooth operation. What could be wrong, and can it be fixed without replacing the gauge? Thanks in advance!

 

StangIt #1

Founding Member

Oct 25, 2001

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Washing the Car

Dec 23, 2003

#2

• Dec 23, 2003

• #2

TTT, anybody?

 

R

RacerGT

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Jun 28, 2002

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St. Charles, Missouri

Dec 23, 2003

#3

• Dec 23, 2003

• #3

Do you have aftermarket gauge faces? If so, it's probably sticking on that. Take it out and smooth it all the way flush to the surface.

If not, I don't know what to tell ya, sorry.

 

StangIt #1

Founding Member

Oct 25, 2001

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Washing the Car

Dec 23, 2003

#4

• Dec 23, 2003

• #4

RacerGT said:

Do you have aftermarket gauge faces? If so, it's probably sticking on that. Take it out and smooth it all the way flush to the surface.

If not, I don't know what to tell ya, sorry.

Click to expand...

Stock gauges. I've never removed the gauge assembly, either.

 

GTblack_00

New Member

Mar 23, 2003

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Tampa Bay Area, FL

Dec 23, 2003

#5

• Dec 23, 2003

• #5

unfortunatly it sounds like the servo back there is going bad, the sensor part of it anyways. If your car is running fine then it is somewhere between your computer and gages or the gage itself.

 

NFCStang

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Oct 3, 2003

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Taking a leak in an SRT-4 gas tank

Dec 23, 2003

#6

• Dec 23, 2003

• #6

Could it be the sending unit? My Oil pressure gauge does the same thing even though the oil pressure is right on (had it checked)

 

GTblack_00

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Mar 23, 2003

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Tampa Bay Area, FL

Dec 23, 2003

#7

• Dec 23, 2003

• #7

Your engine wouldnt run, the r's are calculated by a trigger wheel on the crank which runs the ignition.

 

GTblack_00

New Member

Mar 23, 2003

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Tampa Bay Area, FL

Dec 23, 2003

#8

• Dec 23, 2003

• #8

Generally, I can bump the top of the dash and the gauge will go back to normal, but it still isn't smooth operation

Click to expand...

thinking about it.

sounds like a gage issue or harness at the rear of them.

 

NFCStang

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Oct 3, 2003

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Taking a leak in an SRT-4 gas tank

Dec 23, 2003

#9

• Dec 23, 2003

• #9

GTblack_00 said:

Your engine wouldnt run, the r's are calculated by a trigger wheel on the crank which runs the ignition.

Click to expand...

Good point...thanks, I had forgotten that

 

StangIt #1

Founding Member

Oct 25, 2001

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16

Washing the Car

Dec 23, 2003

#10

• Dec 23, 2003

• #10

GTblack_00 said:

thinking about it.

sounds like a gage issue or harness at the rear of them.

Click to expand...

How much would I be looking at to replace the gauge or harness, say, from a junked GT? Will I have to replace all of the gauges (is it one harness) or just the tach?