Spark plugs removal

Tiny
JJSTELM
  • MEMBER
  • 2009 HYUNDAI SONATA
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 118,000 MILES
I was watching your video on spark plugs for this vehicle. Is there anything I should unplug or detach that is electrical within the car before doing spark plugs? Such as a battery, sensors, etc. And if I disconnect the battery should I only take the negative off or the positive terminal as well? Just trying to be precautious. Thanks!
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Thursday, April 25th, 2019 AT 1:05 AM

37 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning,

No special items to disconnect. No need to remove the battery cable as well. Here is a guide to help with diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Thursday, April 25th, 2019 AT 4:07 AM
Tiny
CARLW
  • MEMBER
  • 2008 HYUNDAI SONATA
  • 90,000 MILES
What is the spark plug gap for the 2.4L Thanks
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Friday, November 27th, 2020 AT 5:42 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Hello the spark plug gap is - Gap 1.0 1.1 mm (0.0394 0.0433 in.) here is a guide that will help walk you through the service.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please let us know if you need anything else to get the problem fixed.

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Friday, November 27th, 2020 AT 5:42 PM (Merged)
Tiny
JESARAM
  • MEMBER
  • 2004 HYUNDAI SONATA
  • 180,000 MILES
I have a 2004 hyundai sonata with 180000 miles on it 5spd 4cyl. The problem it has is that ever time I accelerate I see electricity coming out of the plastic boot of my spark plugs. I replaced the plastic boot but now it sparks even more. What could be wrong? I appreciate any help. THANK YOU :)
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Friday, November 27th, 2020 AT 5:43 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Were the spark plugs and wires replaced?
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Friday, November 27th, 2020 AT 5:43 PM (Merged)
Tiny
JESARAM
  • MEMBER
No I haven't. The problem is that it arcs at the top of the plastic booth to the side of the intake.
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Friday, November 27th, 2020 AT 5:43 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
If you mean the plastic boot of the plug wire or ignition coil, when you have a bad wire, arcing would occur. Bad spark plugs could be the cause as well.
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
JESARAM
  • MEMBER
Would you recommend changing the wires and spark plugs? I appreciate your help. :)
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
JESARAM
  • MEMBER
Do you think it could be the coils on it?
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Usually the wires are the ones to ail first and Have those replaced first and retest.
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
JESARAM
  • MEMBER
I have replaced the wires but no difference I also tried other coils but it still keeps arcing and now when I turn my A/C on it starts to shake.
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Have you replaced the spark plugs?
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
JESARAM
  • MEMBER
No I haven't but I took them out and they seem to be fine. But I will
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
KAWANEE
  • MEMBER
  • 2003 HYUNDAI SONATA
Electrical problem
2003 Hyundai Sonata 6 cyl Two Wheel Drive Automatic

How much does it cost to replace the spark plugs and wires on my 2003 Hyundai Sonata?
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Labor rate per hr. varies with location could range from $70-$130.00 per hr. See quote


https://www.2carpros.com/forum/automotive_pictures/12900_spark_plug_wires_and_plugs_1.jpg

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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Ok

Good luck
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
WGORHAM
  • MEMBER
  • 2003 HYUNDAI SONATA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 138,000 MILES
Where are the spark plugs located on the car. How do you replace them?
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Its under the coil and plug wires-see below


https://www.2carpros.com/forum/automotive_pictures/12900_sparkplugs_2.jpg

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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
YESI OLIVAREZ
  • MEMBER
  • 2003 HYUNDAI SONATA
  • 2.4L
  • 4 CYL
  • AUTOMATIC
  • 65,000 MILES
How do I replace the spark plugs and the spark plug boots?
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Friday, November 27th, 2020 AT 5:44 PM (Merged)
Tiny
STEVE W.
  • EXPERT
You shouldn't need to replace the plug boots unless they are damaged or the wires are bad.

To replace the plugs, start at one end of the engine, pull up on the plug wire boot to remove it from the plug, then use a spark plug socket and extension to remove the plug. Examine the plug for any problems. Now check the gap on the new plug, adjust as required (the plug number and gap will be on the emissions sticker under the hood) install it into the head and tighten it down. If the boot is damaged you simply follow that wire back and remove it, select the same sized wire from the new set and install it in reverse of the way you removed it.
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Friday, November 27th, 2020 AT 5:44 PM (Merged)

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