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Old 03-29-2019, 11:18 AM   #6
The Master Cylinder
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Default Re: Sudden rough running, out of ideas

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Quote:
Originally Posted by alexiskai View Post
Problem: '29 coupe suddenly started running very rough, not drivable

[*]Sounds like the cylinders are only occasionally firing, engine rotation very irregular
[*]Sparkplugs show a lot of black residue
Fouled plugs? Try cleaning them.
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