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Author Topic: Tacho Problem  (Read 1945 times)
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Peter W
Senior Member
*****
Posts: 114



« on: 17 September, 2009, 10:53:27 PM »

The tacho on my 1600HF has started to play up.  On starting it appears to read correctly for a second or so but then rapidly goes round to 6000 rpm.  At tickover it fluctuates violently from 2000 to 6000 & as soon as I build the revs up a little it reverts to 6000.  The engine is running perfectly.  I am not sure whether to look for a wiring fault or an instrument problem.  Has anyone experienced a similar problem?

Peter
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Kappa Coupe
Beta VX Coupe
S2 Fulvia 1600HF
nistri
Megaposter
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Posts: 375


« Reply #1 on: 18 September, 2009, 07:01:22 AM »

First, I would check carefully the electrical connection of the tacho to the coil. Second, if you are using electronic ignition, the special module between the black box and the tacho to transduce its electrical signals may be damaged (this is a common problem). Otherwise it is likely to be the instrument. Andrea
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Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
Fulvia Coupe 1.3 S
Peter W
Senior Member
*****
Posts: 114



« Reply #2 on: 18 September, 2009, 11:13:49 PM »

Hi Andrea.  I am not using elctronic ignition & the tacho connection is firmly attached to one side of the ballast resistor, so it looks as though I will have to source another instrument.

Peter
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Kappa Coupe
Beta VX Coupe
S2 Fulvia 1600HF
lancialulu
Press Officer
Permanent resident
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Posts: 4251



« Reply #3 on: 19 September, 2009, 08:40:42 PM »

Peter

Have you checked the earthing behind the dash?

Tim
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
Peter W
Senior Member
*****
Posts: 114



« Reply #4 on: 20 September, 2009, 11:53:47 AM »

Tim

I am just about to go off sailing for a week but when I get back I will get down to a detailed examination.

Peter
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Kappa Coupe
Beta VX Coupe
S2 Fulvia 1600HF
Dilambdaman
Permanent resident
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Posts: 1356



« Reply #5 on: 23 September, 2009, 12:18:46 AM »

Peter

I've got a spare set of black face Fulvia instruments. Any use to you?

Robin.
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Robin Lacey 3222

1932 Dilambda
1969 Fulvia S1 1.6HF Fanalone
Peter W
Senior Member
*****
Posts: 114



« Reply #6 on: 29 September, 2009, 03:42:47 PM »

Thank you for the offer Robin,  I would like to take you up on that.

Peter
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Kappa Coupe
Beta VX Coupe
S2 Fulvia 1600HF
Dilambdaman
Permanent resident
**
Posts: 1356



« Reply #7 on: 29 September, 2009, 10:33:49 PM »

Peter,

I've sent you an email.

Robin.
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Robin Lacey 3222

1932 Dilambda
1969 Fulvia S1 1.6HF Fanalone
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