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TACHO PROBS AGAIN

For all things Electrical.

Moderator: -Scott-

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Posts: 1552
Joined: Wed Dec 22, 2004 12:09 pm
Location: im at wello point

TACHO PROBS AGAIN

Post by bilby »

ok my tacho pulses with out the engine changing revs
now its doing it while under load 2000rpm it drops 100rpm up and down slowly

COULD THE COIL BE SHAGGED ????

it only does this when the car is cold til running temp then
it sorts it self out
just a little left of insanity :)
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mav
Posts: 320
Joined: Thu Jun 26, 2003 1:53 pm
Location: traralgon victoria

ignition

Post by mav »

hi is it electronic ign? it could be the ignition module or if it is points it could be the condensor or the points.
see ya mav
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Posts: 1552
Joined: Wed Dec 22, 2004 12:09 pm
Location: im at wello point

Re: ignition

Post by bilby »

mav wrote:hi is it electronic ign? it could be the ignition module or if it is points it could be the condensor or the points.


yep has a pirana elec ignition in it

is there anyway to test if its on the blink ?
just a little left of insanity :)
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Posts: 3224
Joined: Mon Jan 12, 2004 6:03 pm
Location: Moggill

Post by phippsy »

I got an old aftermarket tacho somewhere at home, would it work to hook it up and see if it has the same problem? It worked fine when I pulled it out of my old car.
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mav
Posts: 320
Joined: Thu Jun 26, 2003 1:53 pm
Location: traralgon victoria

terminals

Post by mav »

try checking the terminals make sure there tight and clean. what triggers the ignition on the pirana system ??
see ya mav
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Posts: 1552
Joined: Wed Dec 22, 2004 12:09 pm
Location: im at wello point

Re: terminals

Post by bilby »

mav wrote:try checking the terminals make sure there tight and clean. what triggers the ignition on the pirana system ??


not quite sure to be honest
just a little left of insanity :)
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User avatar
mav
Posts: 320
Joined: Thu Jun 26, 2003 1:53 pm
Location: traralgon victoria

Re: terminals

Post by mav »

bilby wrote:
mav wrote:try checking the terminals make sure there tight and clean. what triggers the ignition on the pirana system ??


not quite sure to be honest



it should be hall effect or optical.
see ya mav
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Posts: 343
Joined: Fri Jun 18, 2004 3:25 pm
Location: Melbourne

Post by EricB »

I had a similar thing but my tacho dropped quickly and then went back to normal. It ended up being my points and after installing my pertronix ignitor ignition, all fixed.

PS. I first replaced my coil with no change.
2000 GU II 4.2TD
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