still has a misfire - engine shakes?

1997 HYUNDAI ACCENT
80,000 MILES
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WILLIAMROSARIO
  • MEMBER
  • 1 POST
replaced head gasket, timing belt,spark plugs, wires. timing marks are perfect. firing order are good too. car still has a miss. engine shakes .
Dec 18, 2012 at 5:21 PM
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SQM
  • ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

The misfire can be due to a faulty coil pack.
Are you getting the check engine light for this misfire?
Usually is the module or coil pack is bad then you could get random cylinder misfire.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

The coil can be tested. You will need to measure the internal resistance of the coil. I have attached the testing procedure for the coil pack (see below). As well as resistance value for the coil.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please let me know of any questions.
Thank you.
Sep 8, 2021 at 11:58 PM
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