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Q: My Check Engine Light is on and my engine starts to shake when accelerating.

asked by on

my engine light comes on and my engine starts shaking when I accelerate. someone said that the cylinder was losing compression but I should change the spark plugs.

My car has 190000 miles.
My car has a manual transmission.

A: Hi there. Don&#39;t change anything until y...

Hi there. Don't change anything until you've determined the cause of the Check Engine Light and shaking. First retrieve the codes that may be stored; most likely these are misfire codes so investigate the cause of the misfire; simply changing spark plugs may not repair the problem. It could very well be mechanical and a compression test would clear the air on this part.

However, you could have a failing ignition coil and this will definitely give you what you're experiencing. Without the codes, there is really no true starting point. I strongly suggest acquiring a qualified technician, such as one from YourMechanic, to perform an inspection to determine why the Check Engine Light is on and replace the ignition coil if necessary.

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