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Ignition coil and spark plug replacement

Tiny
ANTHONYWILSON1
  • MEMBER
  • 2009 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • 154,000 MILES
My car recently had a rough idle and after checking the Check Engine light at AutoZone, they told me that I'd have to try and replace them. I don't have the money to go to a mechanic and have them do it for me so I'm trying to do it on my own.

Will something happen to my car if I disconnect the battery to do this? And any tips to try and make this easier on myself?
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Friday, April 22nd, 2022 AT 3:08 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

No need to disconnect the battery. Just remove the four connectors for the coils and remove the plugs.

I attached the procedure below for you.

Roy
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Friday, April 22nd, 2022 AT 3:17 PM
Tiny
ANTHONYWILSON1
  • MEMBER
  • 3 POSTS
Thank you so much! Though I am worried about the torque since I don't have that kind of wrench on me. Would I have to get a digital display wrench or is there a different way?
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Friday, April 22nd, 2022 AT 6:40 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You can rent one at a parts store.

Roy
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Friday, April 22nd, 2022 AT 6:55 PM

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