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Author Topic: Tacho problems.  (Read 1122 times)

Offline peter t

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Tacho problems.
« on: September 21, 2011, 03:31:34 PM »
Have searched the threads but don't seem to notice this same problem. My tacho works most days but now and then it stops working. It can start up while driving or just stop. Doesn't affect the motor. Start up and go and get the paper, Works. Jump in start up and it don't work, drive down the road a bit and it may start working or it may not. What to check? Thanks for any help. ??? ???
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         Peter "T"
 
  75 260Z 2+2

Offline benny

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Re: Tacho problems.
« Reply #1 on: September 21, 2011, 04:01:21 PM »
mine is the same peter... will be going over it in the next weeks so will let you know if i have any ideas!!
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Offline Zedman240

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Re: Tacho problems.
« Reply #2 on: September 21, 2011, 04:04:06 PM »
A guess would be within the tacho itself...poor connection?
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Offline peter t

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Re: Tacho problems.
« Reply #3 on: September 21, 2011, 04:22:55 PM »
Thanks guys, I have a spare so will rig that up as described in another thread and see what happens. Let me know how you get on with yours Benny and I will do the same as soon as I figure it out.  8) I saw some talk of a fuse. Is this inside the tacho or elswhere? 8)
« Last Edit: September 21, 2011, 04:24:28 PM by peter t »
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         Peter "T"
 
  75 260Z 2+2

Offline peter t

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Re: Tacho problems.
« Reply #4 on: October 11, 2011, 04:15:49 PM »
Pulled it out and put it in. Don't mean to be rude but still have problem with both gauges. Checked all fuses and all OK. Might try a new ballast resister and see what happens. 8)
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         Peter "T"
 
  75 260Z 2+2

Offline gilltech

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Re: Tacho problems.
« Reply #5 on: October 12, 2011, 05:54:44 AM »
My 260 tach was doing the same thing when I put the car into storage some years ago. I couldn't figure out what was causing it at the time, it seemed to be getting power OK, so I had a niggling suspicion that it was probably linked to the dizzy, as in whatever triggers the tach reading was causing a very irregular fault. Just an idea though.
« Last Edit: October 12, 2011, 06:02:54 AM by gilltech »
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Offline BobsYourUncle

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Re: Tacho problems.
« Reply #6 on: October 12, 2011, 07:12:02 AM »
Peter, is your tacho a 3-wire (inductive) or 4-wire? My 74 2+2 had the 3-wire type, and it never worked. I tried a spare, and it didn't work either - I was under the impression the inductive type tachos didn't work too well with electronic injection?
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Offline peter t

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Re: Tacho problems.
« Reply #7 on: October 14, 2011, 04:56:54 PM »
 8)
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         Peter "T"
 
  75 260Z 2+2

Offline peter t

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Re: Tacho problems.
« Reply #8 on: October 14, 2011, 04:59:43 PM »
Quote from: BobsYourUncle on October 12, 2011, 07:12:02 AM
Peter, is your tacho a 3-wire (inductive) or 4-wire? My 74 2+2 had the 3-wire type, and it never worked. I tried a spare, and it didn't work either - I was under the impression the inductive type tachos didn't work too well with electronic injection?
Not sure what you mean. Don't have injection. Played with the wires at the resistor and now it is going. Tomorrow may be different.
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         Peter "T"
 
  75 260Z 2+2

Offline BobsYourUncle

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Re: Tacho problems.
« Reply #9 on: October 14, 2011, 05:03:15 PM »
Oops, I meant electronic ignition. My bad...
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Offline peter t

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Re: Tacho problems.
« Reply #10 on: October 19, 2011, 06:49:27 PM »
Quote from: benny on September 21, 2011, 04:01:21 PM
mine is the same peter... will be going over it in the next weeks so will let you know if i have any ideas!!
Wacked a new connector on the green/white wire that goes on the basalt resistor and seems to have fixed it.  8)
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         Peter "T"
 
  75 260Z 2+2

Offline peter t

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Re: Tacho problems.
« Reply #11 on: October 20, 2011, 05:03:59 PM »
@@@@@@@@ It has stopped working again. :'(
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         Peter "T"
 
  75 260Z 2+2

Offline wildy55

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Re: Tacho problems.
« Reply #12 on: October 21, 2011, 06:07:09 AM »
Hey there
Can't answer your problem (sorry) but maybe you can answer mine. Pulled everything off the inner wings to spray and have everything back and working apart from the tacho. Was working fine before. It's the connections around the coil I want to check. I put an electronic module on for the ignition, so did away with the balast resistor. Do I need that to make the tacho work? So far I've worked out that the b/w wire should go to the + terminal of the coil (is this correct?). I've tired that but no luck. Can you tell me what wires you have coming from the terminals on the coil please?
Cheers
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Offline pauly_adams

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Re: Tacho problems.
« Reply #13 on: October 21, 2011, 10:43:08 AM »
it must be an epidemic mine keeps working then stopping all week, it has happend to me before so i pulled it appart and cleaned it but it still would not work then one day it just started working again so its got me stumped.

wildy i went out to have a look at my setup but i cant help i have replaced that side of the wiring in my car

cheers pauly
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Offline peter t

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Re: Tacho problems.
« Reply #14 on: October 21, 2011, 05:15:22 PM »
Quote from: wildy55 on October 21, 2011, 06:07:09 AM
Hey there
Can't answer your problem (sorry) but maybe you can answer mine. Pulled everything off the inner wings to spray and have everything back and working apart from the tacho. Was working fine before. It's the connections around the coil I want to check. I put an electronic module on for the ignition, so did away with the balast resistor. Do I need that to make the tacho work? So far I've worked out that the b/w wire should go to the + terminal of the coil (is this correct?). I've tired that but no luck. Can you tell me what wires you have coming from the terminals on the coil please?
Cheers
Will have a look for you in the morning and let you know.  8)
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Cheers,
         Peter "T"
 
  75 260Z 2+2

Auszcar 240z, 260z, 280zx Forums

Re: Tacho problems.
« Reply #14 on: October 21, 2011, 05:15:22 PM »
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