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 Post subject: Rev counter in 2nd gen
PostPosted:Sun Jul 22, 2012 8:52 pm 
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Small Block
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Joined:Fri Jun 22, 2012 5:15 pm
Posts:18
Car Details:Black 1979 Z28
Hi all,
was just wondering if anyone out there has had problems with there rev counter, mine is telling me the revs are really high when they're not, for example on tick over its saying 2500 not 800 or whatever it should be.
can they be replaced as a single item or has the whole cluster got to be replaced. can they be calerbrated or any other means of fixing..
its in a 79 Z28.
Cheers
Paul


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Rev counter in 2nd gen

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PostPosted:Mon Jul 23, 2012 9:24 am 
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Big Block
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Joined:Fri Mar 19, 2010 1:35 am
Posts:2566
Car Details:79' camaro road & track day toy. 383 stroker, 5 speed TKO trans, lots of suspension stuff, 13" Vette brakes, 18" wheels.
Location:Luton
Depends on the type of distributor you have. I'm not sure about the early external coil types, but later HEI distributors with built in coil have one wire that goes to a module on the bulkhead, this has a wire then goes through the bulkhead into the dash loom.
On mine this wire broke off the module leaving no tach reading, check this wire is connected properly if you have this type .

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PostPosted:Mon Jul 30, 2012 1:59 pm 
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Big Block
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Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
have you tried taking your foot off the gas pedal? :mrgreen:
Strange issue that, not sure what could be causing it. Stu could be onto something there. I learnt that jiggling wires about helps identify dodgy wiring / connectors so give it a try and see if you can localise the issue and then we can take it from there.
Cheers!

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PostPosted:Tue Jul 31, 2012 10:44 pm 
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Small Block
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Joined:Fri Jun 22, 2012 5:15 pm
Posts:18
Car Details:Black 1979 Z28
lol, believe me i've wiggled and jiggled the wires, but just the same. if the weather is good at the weekend i'll have a proper go at it,


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PostPosted:Sat Mar 25, 2017 5:46 pm 
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Big Block
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Joined:Mon Feb 15, 2016 4:30 pm
Posts:537
Car Details:1970 Chevrolet Camaro RS/SS 454
I have this same issue! But with an auto box I really don't see a problem!


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