AutoMeter tach?

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bluebeast

Founding Member

Jul 19, 2002

215

0

0

Mass

Mar 6, 2004

#1

• Mar 6, 2004

• #1

i installed my autometer sport comp tach on my car. i followed the directions how they told me to BUT i have a problem. When my car is idling the tach reads about 3k as i go the tach jumps all over the place until my stock tach reads 3k then the autometer one jumps down to 3k and works fine until i go below 3k. Basicly anything below 3k my tach goes nuts. any ideas on what could be wrong. i also have a whole jacobs ignition thing kinda like the msd but jacobs i also have a jacobs ultra coil. The instructions only mention the msd.
thanks
eric

 

Black331Stang

Active Member

Apr 29, 2003

1,485

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36

Long Island, NY

Mar 6, 2004

#2

• Mar 6, 2004

• #2

probably not what u looking for but only discrepancy i have invloving 3000 is that i cant set my shift point any lower than about 3400. i dunno if its normal or not

 

Sgt.5point0

Member

Jul 26, 2003

258

0

16

Rapid City, South Dakota

Mar 6, 2004

#3

• Mar 6, 2004

• #3

I don't know a lot about the aftermarket ignition products but I think some of them have a specific spot on the box that you're supposed to run you tach signal wire to instead of the coil.

 

88stangmangt

Active Member

Nov 25, 2003

2,332

1

48

Stafford,VA

Mar 6, 2004

#4

• Mar 6, 2004

• #4

are you sure you have it set for a v-8 rather than a 6 or a 4? they send out diff igniotn signals.

 

Sgt.5point0

Member

Jul 26, 2003

258

0

16

Rapid City, South Dakota

Mar 6, 2004

#5

• Mar 6, 2004

• #5

88stangmangt said:

are you sure you have it set for a v-8 rather than a 6 or a 4? they send out diff igniotn signals.

Click to expand...

Thats true also... I think on the Autometers you have to actually cut wires at the back of the tach to go down in cylinders. I hope you didn't do that

 

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bluebeast

Founding Member

Jul 19, 2002

215

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0

Mass

Mar 6, 2004

#6

• Mar 6, 2004

• #6

nope i did not cut any of the wires on the back. it is set up for an 8 cyl. could it be my ground? do u have to ground it to the engine like it says?

 

Sgt.5point0

Member

Jul 26, 2003

258

0

16

Rapid City, South Dakota

Mar 7, 2004

#7

• Mar 7, 2004

• #7

Yeah you could try moving the ground... If it does the same thing when you move the ground then that's probably not whats wrong. Did you check your Jacobs Ignition for a tach outlet?

 

88stangmangt

Active Member

Nov 25, 2003

2,332

1

48

Stafford,VA

Mar 7, 2004

#8

• Mar 7, 2004

• #8

ya you might need a tach driver.