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 3Likes
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1
Post By Detroit Bill
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1
Post By rodneym
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1
Post By Detroit Bill
04-21-2015, 06:52 AM
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CC Member
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Join Date: Nov 2014
Location: Brentwood,
Tn
Cobra Make, Engine: Superformance #3168
Posts: 1
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Not Ranked
Tachometer problem
I have a Superformance Cobra with 3000 miles and the tachometer stopped working. Can anyone recommend a quick fix?
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04-21-2015, 07:14 AM
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CC Member
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Join Date: Aug 2014
Location: Syracuse,
Ny
Cobra Make, Engine: Superformance #2660, FE-406
Posts: 372
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Not Ranked
Not without seeing the car, no. It's either a drive gear issue or a guage issue. First thing I'd do is check the drive end at the transmission, could be loose. If not, unscrew it and lightly chuck the cable end in an electric drill and spin it. If the needle moves its the transmission fitting, likely the drive gear. make sure everything is tight first, you can reach up behind the dash and finger tighten the knurled lock ring on the guage .
__________________
The older I get, the faster I was.
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04-21-2015, 11:38 AM
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CC Member
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Join Date: Dec 2014
Cobra Make, Engine: Superformance, Survival Motorsports aluminum FE 482
Posts: 662
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Not Ranked
Quote:
Originally Posted by Tim7139
Not without seeing the car, no. It's either a drive gear issue or a guage issue. First thing I'd do is check the drive end at the transmission, could be loose. If not, unscrew it and lightly chuck the cable end in an electric drill and spin it. If the needle moves its the transmission fitting, likely the drive gear. make sure everything is tight first, you can reach up behind the dash and finger tighten the knurled lock ring on the guage .
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He said Tachometer not speedo.
__________________
Bill
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04-21-2015, 11:40 AM
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CC Member
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Join Date: Dec 2014
Cobra Make, Engine: Superformance, Survival Motorsports aluminum FE 482
Posts: 662
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Not Ranked
A good place to start would be checking the wires on the back of the Tach, have you done that?
__________________
Bill
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04-21-2015, 11:56 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
In my old SPF I had a tach issue that was cause by the center contact in the dizzy being dirty.
Blas to the rescue.
__________________
rodneym
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04-21-2015, 12:34 PM
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CC Member
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Join Date: Jan 2008
Location: Celebration,
FL
Cobra Make, Engine: Superformance #2144 with a Roush 342R (sold June 2018, but still lurking on Club Cobra)
Posts: 128
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Not Ranked
I had an issue in my SPF with the tach being erratic. Turned out to be a bad battery to chassis ground (ground wire was just barely attached to the chassis). I cleaned and refastened the ground and the tach immediately worked as it was supposed to.
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04-22-2015, 07:53 AM
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CC Member
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Join Date: Aug 2014
Location: Syracuse,
Ny
Cobra Make, Engine: Superformance #2660, FE-406
Posts: 372
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Not Ranked
Quote:
Originally Posted by Detroit Bill
He said Tachometer not speedo.
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DUH, why yes he did.
__________________
The older I get, the faster I was.
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04-22-2015, 07:54 AM
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CC Member
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Join Date: Dec 2014
Cobra Make, Engine: Superformance, Survival Motorsports aluminum FE 482
Posts: 662
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Not Ranked
Quote:
Originally Posted by Tim7139
DUH, why yes he did.
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But we love the enthusiasm with which you jumped in to help!
__________________
Bill
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04-22-2015, 07:57 AM
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CC Member
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Join Date: Dec 2014
Cobra Make, Engine: Superformance, Survival Motorsports aluminum FE 482
Posts: 662
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Not Ranked
Quote:
Originally Posted by Sailfish
I had an issue in my SPF with the tach being erratic. Turned out to be a bad battery to chassis ground (ground wire was just barely attached to the chassis). I cleaned and refastened the ground and the tach immediately worked as it was supposed to.
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I think when I get my car I am going to make sure that ground is good and possibly add and or check the engine to chassis ground. That is a classic cause for mystery problems. Stand on the gas and the car stumbles.....
__________________
Bill
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04-22-2015, 08:16 AM
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CC Member
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Join Date: Aug 2014
Location: Syracuse,
Ny
Cobra Make, Engine: Superformance #2660, FE-406
Posts: 372
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Not Ranked
Quote:
Originally Posted by Detroit Bill
But we love the enthusiasm with which you jumped in to help!
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Remember, all these Smith's tachs were mechanical, I guess I'm in motorcycle mode, my Triumph's have nice cables off the gearbox.
__________________
The older I get, the faster I was.
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04-22-2015, 08:54 AM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Time Machines Motorsports LLC- Superformance Dealer
Posts: 4,493
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Not Ranked
Roger,
Give me a call. We will ship a replacement if needed.
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