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Why does the my engine shake during a cold start for 3-4 seconds and then is fine?
Wiki User
∙ 15y ago
Engines will often "misfire" for a while when they're extremely cold. Misfire means that one or more cylinders aren't firing when the other cylinders are running. When that happens it feels like the engine is shaking.
There are many reasons why an engine might not run well when cold, anywhere from needing a tune-up to burned valves or even injector problems.
If it's been a while since the engine has been tuned up, try that first, but have the shop run a compression test while they're replacing the plugs.
Wiki User
∙ 15y ago
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