Intermittent Tach issue
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Joined: May 2015
Posts: 71
Likes: 6
From: Ray Twp Michigan
Intermittent Tach issue
1975 350 (not original) MSD Distributor, external coil.
Tachometer works for first few minutes on startup, but as engine warms up it quits.
Sounds like a loose wire or ground possibly. I saw some threads on the tach filter, sounds like that it would not work at all.
Also, found out about a small adapter for the MSD ignition but I did not install it and do not have the adapter if needed.
Any other ideas?
Thanks!
Tachometer works for first few minutes on startup, but as engine warms up it quits.
Sounds like a loose wire or ground possibly. I saw some threads on the tach filter, sounds like that it would not work at all.
Also, found out about a small adapter for the MSD ignition but I did not install it and do not have the adapter if needed.
Any other ideas?
Thanks!
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
1975 350 (not original) MSD Distributor, external coil.
Tachometer works for first few minutes on startup, but as engine warms up it quits.
Sounds like a loose wire or ground possibly. I saw some threads on the tach filter, sounds like that it would not work at all.
Also, found out about a small adapter for the MSD ignition but I did not install it and do not have the adapter if needed.
Any other ideas?
Thanks!
Tachometer works for first few minutes on startup, but as engine warms up it quits.
Sounds like a loose wire or ground possibly. I saw some threads on the tach filter, sounds like that it would not work at all.
Also, found out about a small adapter for the MSD ignition but I did not install it and do not have the adapter if needed.
Any other ideas?
Thanks!
If the tach filter gets loose the tach will work then not work. So make sure the filter is bolted down tight.
Thread Starter
Advanced
Joined: May 2015
Posts: 71
Likes: 6
From: Ray Twp Michigan
Thread Starter
Advanced
Joined: May 2015
Posts: 71
Likes: 6
From: Ray Twp Michigan
I finally got around to the tach issue again. I was fiberglassing the battery compartment (fixing the hole and adding a battery tie-down) and also replacing the Power Steering Assist.
Anyway, I found the tach filter. It has an MSD box along with the MSD distributor. The MSD box had about 16" of redundant wiring attached to the tach filter. When I picked up the tach filter and one of the wires just fell off! So definitely a loose connection. Another thread said you can bypass it so that's what I am trying first and see if I even need to replace it. I will update the thread as I found more info.
Anyway, I found the tach filter. It has an MSD box along with the MSD distributor. The MSD box had about 16" of redundant wiring attached to the tach filter. When I picked up the tach filter and one of the wires just fell off! So definitely a loose connection. Another thread said you can bypass it so that's what I am trying first and see if I even need to replace it. I will update the thread as I found more info.
Drifting
Joined: Dec 2012
Posts: 1,360
Likes: 59
From: Meldrim Georgia
I finally got around to the tach issue again. I was fiberglassing the battery compartment (fixing the hole and adding a battery tie-down) and also replacing the Power Steering Assist.
Anyway, I found the tach filter. It has an MSD box along with the MSD distributor. The MSD box had about 16" of redundant wiring attached to the tach filter. When I picked up the tach filter and one of the wires just fell off! So definitely a loose connection. Another thread said you can bypass it so that's what I am trying first and see if I even need to replace it. I will update the thread as I found more info.
Anyway, I found the tach filter. It has an MSD box along with the MSD distributor. The MSD box had about 16" of redundant wiring attached to the tach filter. When I picked up the tach filter and one of the wires just fell off! So definitely a loose connection. Another thread said you can bypass it so that's what I am trying first and see if I even need to replace it. I will update the thread as I found more info.
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Joined: May 2015
Posts: 71
Likes: 6
From: Ray Twp Michigan
Great! I wanted to fire her up last night but didn't want to wake everyone in the house up.
Maybe when I get home from work tonight. (There is a fair in town this week!)
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Joined: May 2015
Posts: 71
Likes: 6
From: Ray Twp Michigan
Well I started her up the other day after removing the tach filter and it works fine. The tach filter was not bolted down and was just laying there in a bunch of wires.
Works like a charm now - Thanks!
Works like a charm now - Thanks!
Drifting
Joined: Dec 2012
Posts: 1,360
Likes: 59
From: Meldrim Georgia
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