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tacho problems!!!!

Started by _levis_ , Apr 21 2007 06:50 PM

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15 replies to this topic

#1 _levis_

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Posted 21 April 2007 - 06:50 PM

installed my tacho today its switched to six cylinders but the needle bounces, i've cheked all connections and grounds so next stop is to get a resistor... but the real thing that worries me is the tacho is saying my motor will rev up to 10 grand? any ideas?

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#2 TerrA LX

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Posted 21 April 2007 - 07:06 PM

Where did you hook the wire up to trigger the tacho from?

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#3 _levis_

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Posted 21 April 2007 - 07:16 PM

negative side of distributer coil??

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#4 TerrA LX

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Posted 21 April 2007 - 07:32 PM

What distributer is it?

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#5 _levis_

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Posted 21 April 2007 - 07:46 PM

points sorry for all the information i left out i meant to include it!

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#6 _ChevLX_77_

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Posted 22 April 2007 - 01:58 AM

Ok is it a standard tacho or aftermarket (Autometer).

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#7 rodomo

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Posted 22 April 2007 - 09:12 AM

If it has a switch it shouldn't need a resistor. Has it been laying around in the shed for a while? Flick the switch a few times to "freshen up" the contacts. Re-check all your connections.

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#8 _levis_

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Posted 22 April 2007 - 05:11 PM

the contacts seem fine there is a definate change in revs when i switch from 4 to 6 to 8 it has been in my room for ages.... connections still all seem good a mate said it may be the condensor on the distributer? i also used slightly thicker wire from the end of the tacho wires could this be a problem???? doing my head in!!

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#9 Struggler

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Posted 22 April 2007 - 08:20 PM

There was a thread on this ages ago, can't remember the fix though.

Have a search.

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#10 rodomo

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Posted 22 April 2007 - 08:43 PM

There was a thread on this ages ago, can't remember the fix though.

Have a search.

I think that was aftermarket electronic though? Try the condenser, H.E.I makes the tacho do funny things just before the module dies sometimes.

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#11 _levis_

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Posted 22 April 2007 - 08:47 PM

will do cheers everyone!

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#12 _SS Hatchback_

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Posted 30 April 2007 - 10:32 PM

i had that issue with autometer, but put a variable resistor inline and turned it up until stopped bouncing and all fixed now, I went through thinking it was a bad earth from somewhere but nothing. I am running HEI too.

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#13 _devilsadvocate_

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Posted 01 May 2007 - 06:40 PM

What does the tacho misbehave(bounce) on the 4 and 8 cyl positions as well?

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#14 _JNR_ATE_

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Posted 05 May 2007 - 08:56 PM

Sorry to steal the thread,
Im having a problem with my SLR cluster tacho, when i first started my engine it was reading good, my autometer was a little more accurate though, then one day it stopped working, Now all of a sudden its working again but about 300Rpm diff to my autometer.

How accurate are the the SLR clusters, all the wiring is new behind the dash so im assuming its not the problem, assumptions are the mother of all @^&$ UPS!

Cheers
JNR_ATE