Tach Problems - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 9 (permalink) Old Apr 11th, 10, 06:04 PM Thread Starter
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Scott
 
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Tach Problems

All I did over the winter was take motor out to paint and now I hook the brown wire to the Negative side of coil and my Tach goes backwards.
MSD Pro Billet Distributor with coil http://www.msdignition.com/Products/...stributor.aspx

1969 Camaro Convertible 427 5 Speed
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post #2 of 9 (permalink) Old Apr 11th, 10, 06:19 PM
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Al
 
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Re: Tach Problems

Hook your tach wire to the green wire that comes out of the MSD distributor.


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post #3 of 9 (permalink) Old Apr 12th, 10, 05:42 AM Thread Starter
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Re: Tach Problems

Quote:
Originally Posted by BPOS View Post
Hook your tach wire to the green wire that comes out of the MSD distributor.
There is no green wire on this MSD ditributor

1969 Camaro Convertible 427 5 Speed
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post #4 of 9 (permalink) Old Apr 12th, 10, 08:26 AM
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Al
 
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Re: Tach Problems

In an earlier thread I "guessed" that you have an MSD 8360. If you do in fact have an 8360 there "should" be a green tach feed wire. It is not in the 3 wire bundled harness with the plug connector, but about a 6" wire that comes out of the bottom of the dist body all by itself with a female spade connector at the end.

If you don't have the green wire, then you probably don't have an 8360 - or - somebody clipped the wire.

Even if you find the green, there's no guarantee that your tach will work correctly. There are lots of reports of the factory tach (esp the repro tachs) not working correctly with MSD ignition, and might require some sort of tach filter.

JimM on this site knows his way around these things pretty well. I'd contact him, or the MSD tech help.


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post #5 of 9 (permalink) Old Apr 12th, 10, 11:23 AM Thread Starter
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Scott
 
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Re: Tach Problems

MSd Tech said I might need a resistor wire inbetween tach wire and neg side of coil
10K 1/2W resistor... How does one wire that up?
Funny thing it work perfect last year

1969 Camaro Convertible 427 5 Speed
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post #6 of 9 (permalink) Old Apr 12th, 10, 06:24 PM
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Al
 
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Re: Tach Problems

Interesting that you don't have the tach feed wire. JimM says his 8360 doesn't have one either, yet the directions you linked to show it. Maybe they added it on newer models. Who knows.

I'd install one of these. Costs less than $3 to make, and can't do any harm.

http://www.jimragtop.com/TC/tachfilter/


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post #7 of 9 (permalink) Old Apr 13th, 10, 04:03 AM Thread Starter
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Scott
 
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Re: Tach Problems

Yes 100% no tach wire.
Will give it a try! Crossing fingers

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post #8 of 9 (permalink) Old Apr 14th, 10, 07:54 AM Thread Starter
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Scott
 
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Re: Tach Problems

Well I guess my first statement was incorrect.
Got car back from exhaust shop and drove it home and the tach isnt working at all!!!!

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post #9 of 9 (permalink) Old Apr 14th, 10, 05:06 PM Thread Starter
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Scott
 
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Re: Tach Problems

Is there a circuit board on the back of the factory tach? Maybe that is the problem?

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