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http://bostonstangs.com/ -> BOSTONSTANGS.COM -> Tech Forums -> Autometer Tach Problem
Post InfoTOPIC: Autometer Tach Problem
boostd710



Posts: 488
Date: November 1st
Autometer Tach Problem


So the other day I take my car out for a ride and noticed that my Autometer tach is off from my factory tach by roughly 500rpm. My factory tach now is the accurate one where i thought the autometer one would be more accurate... When im idling at about 800rpm, the autometer tach reads about 1300-1400rpm. they both climb in rpms at the same rate, they are just off. WHY???

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sled



Posts: 900
Date: November 1st

factory tachs are always off, but if i remember right when your car was put together your tach was fucked up it never was accurate

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shiesta tim
boostd710



Posts: 488
Date: November 2nd

Tim that is false. Ive been driving my car everyday since it was put together and both of the tachs have always been in sync with eachother. This just started the other day and i noticed it right away.

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Timbo8650



Posts: 64
Date: November 3rd

it did have a bad ground before as it only worked with the lights off for some reason, but it was always in sync with the factory tach. once the ground was tightened up it worked fine....

George



Posts: 575
Date: November 4th

Timbo8650 wrote:

it did have a bad ground before as it only worked with the lights off for some reason, but it was always in sync with the factory tach. once the ground was tightened up it worked fine....





I agree, the ground is first place I would check.

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Gotyourcamper



Posts: 16
Date: November 4th

for some reason when i start my car my tach goes to 1.1million rpms and it stays there until i hit mach 5 then it comes back down.

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