AutoMeter Tach not reading correctly!

[WICKED50LTR]

I just installed my AutoMeter 5' Tach and noticed that it doesnt exactly match up with the stock Tach in my 92GT. When im around 2800rpms, the AutoMeter reads around 2500., its always about 2-300rpms off? Any suggestions or maybe i didnt install it correctly? Its wired right to the green wire under the hood that adapts to the coil. There are no loose connections at all, i already checked. Could it be the guage is shady, it was used?

 

[Legendary]

Actually it's the stock rpm guage that might be suspect. They are known to be off.

 

[NYC LSC]

Stock gauges are notrious for being wrong. I'd not even pay attention ot it after adding the AutoMeter.

 

[NoSloCoupes]

Yeah, its the stocker that should be off. Although my autometer is 100rpm off...using my mallory tach test feature.

 

[NosPony]

I have same monster tach in my car mine is about 200-300 rpms differant too normal. Stock tach is know to be off. Trust the autometer it costs a little more.

 

[PRO50SC]

I just installed my AutoMeter 5' Tach and noticed that it doesnt exactly match up with the stock Tach in my 92GT. When im around 2800rpms, the AutoMeter reads around 2500., its always about 2-300rpms off? Any suggestions or maybe i didnt install it correctly? Its wired right to the green wire under the hood that adapts to the coil. There are no loose connections at all, i already checked. Could it be the guage is shady, it was used?

I have the same problem. I bought mine used too. It's off about the same as yours except when I'm at the track. When the stock tack reads 6000 rpm the Autometer is only reading 5000. At that point, I know the Autometer is wrong and not the factory. I may send it in to Autometer to have it checked.

 

[Fostang]

REV it higher man.

Till the rev limiter of 6250........

See what each tach says.

 

[PRO50SC]

REV it higher man.

Till the rev limiter of 6250........

See what each tach says.

I'll send you the bill!!

 

[cevtv]

At that point, I know the Autometer is wrong and not the factory.

I doubt it.

 

[ninety15.0]

I have a 5" AM sport comp in my car and it does the same thing....the tach costs about 250 and the stocker is known to be off. Mine in normally only off by a little but its noticable. I would trust the big one!! haha it does cost more and AM is known for making very accurate guages, not FORD!

 

[ka0tyk]

i have an autometer tach and mine is about 200-400 rpm's off at high rpms... the autometer is reading the actual coil fire, while the stock tach reads the PIP sensor on the distributor... id rather trust the actual coil firing rather than yet ANOTHER faulty sensor...

 

[HarleyFordFan]

ummm.. do any of you guys have a problem with your AM tach's needle bouncing around all the time?

 

[ka0tyk]

ummm.. do any of you guys have a problem with your AM tach's needle bouncing around all the time?

nope mine is nice and steady. i had an MSD 6A ignition with a blaster coil as well... nice and smoooth... it acutally moves up and down quicker than the stock tach...

 

[88stangmangt]

i have a ford racing 5" tach made by autometer it is a ver nice tach works great. more accurate than stock by-far.

 

[Ekliptix]

MY Autometer C2 is 2000 rpm too high at the real 5500rpm.

 

[CobraWannabe]

My Autometer tach is off too. And the bouncing problem may have something to do with the + or - connection. In my old Stang the battery was quitting on me and when it was low on juice the tach would start flipping out. Check all your connections.

 

[stangbear427]

MY Autometer C2 is 2000 rpm too high at the real 5500rpm.

If I paid all that money for a C2 and thought it was wrong I'd be flipping out. Autometer has the best customer service in the industry- why haven't you done something about it?

 

[N8Miller]

I have a 5" sunpro tach and i love it. it is more accurate. it is like 300 difference at all time than the stocker.

pro50sc: i doubt that the autometer is 1000 rpms off at any time. how do you have it wired in? i have mine directly into the 6al box

 

[ninety15.0]

Ya that sounds kind of rediculous that its 2000 rpm off!!! I would send it back....either that or check my wiring because thats not normal.

 

[maverick0716]

I'll send you the bill!!

Oh, you're one of those eh?......That's what the rev limiter is for you know......so you DON'T wreck the engine if you over rev.