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Car Shaking Problems
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Why do my car shake in park when new engine was installed?

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Answered 2010-10-13 08:06:07

When any engine has a rough idle in park or neutral, it usually indicates that the firing order of the sparkplug wires may not be correct. A new engine usually means all new parts. Bring it to a shop and ask them to make sure the firing order is correct.

Make sure they connected all the engine mounts and the transmission mount as well.

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