I replaced the spark plugs and engine coils.car was running fine for about 1hr then the engine started shaking and making a loud noise.. ?
My car has 153000 miles.
My car has an automatic transmission.
You may have a timing chain tensioner or guides issue. You should try to identify where the noise is coming from and scan the computer to get codes and have a mechanic like one from YourMechanic come to you and diagnose the problem for you.
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