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Can the manual tach drive make my car sputter?

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Old 07-18-2012, 02:32 PM
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Dano C3
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Default Can the manual tach drive make my car sputter?

So my tach quit working on my 72, which is annoying, but I'll still drive it until I fix it. Currently the car sputters and back fires when I'm really on the throttle or at higher RPM's. I noticed that when its sputtering the tach will bounce (remember it no longer works). Does it seem feasible that the 2 issues are interelated?

Thoughts?

Thanks
DC
Old 07-18-2012, 02:35 PM
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Big2Bird
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Originally Posted by Dano C3
So my tach quit working on my 72, which is annoying, but I'll still drive it until I fix it. Currently the car sputters and back fires when I'm really on the throttle or at higher RPM's. I noticed that when its sputtering the tach will bounce (remember it no longer works). Does it seem feasible that the 2 issues are interelated?

Thoughts?

Thanks
DC
If the dizzy end play is too much, and the cable/gears hang up, then yes, it could make the timing a tad erratic.
Old 07-18-2012, 07:39 PM
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PeteZO6
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When the tach drive gear fails, if the distributor hold-down clamp is not tight enough, it can cause the distributor to move a bit until the gear completely strips. I'd check the timing first to see if this is what happened. I know this because it happened to me.


Pete
Old 07-18-2012, 07:58 PM
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lars
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Originally Posted by Dano C3
So my tach quit working on my 72, which is annoying, but I'll still drive it until I fix it. Currently the car sputters and back fires when I'm really on the throttle or at higher RPM's. I noticed that when its sputtering the tach will bounce (remember it no longer works). Does it seem feasible that the 2 issues are interelated?
Not likely. Even with a broken tach cable, sheared off shaft gears, and a trashed crossgear, there is nothing in the tach drive system that will affect the trigger system for the ignition.

Lars

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