2020 misfires when accelerating?

Tiny
L177
  • MEMBER
  • 2020 HONDA ACCORD
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 76,000 MILES
Have had this issue for months, been trying to fix it. Changed the spark plugs and the low pressure fuel pump. Nothing has worked. When I changed the spark plugs the issue seemed to stop for awhile.
Thursday, February 26th, 2026 AT 9:06 AM

10 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,411 POSTS
Yep, chances are the ignition coils needs replacement, or if you run the codes you can see which cylinder is failing and just replace that one. Here is how to run the codes to see which cylinder it is

https://www.youtube.com/watch?v=LBCpCWEFnTg

Here is another video that may help

https://www.youtube.com/watch?v=QTE8k06MzwQ

And of course this guide goes over all reasons for a misfire.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please go over these guides and get back to us. Ken
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Friday, February 27th, 2026 AT 7:33 AM
Tiny
L177
  • MEMBER
  • 6 POSTS
I have checked my ignition coils and nothing was wrong. I only got my low pressure fuel pump replaced not my high pressure. Do you think it is the high pressure instead?
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Friday, February 27th, 2026 AT 7:34 AM
Tiny
KEN L
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Yes, it could be, do you have any codes?
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Friday, February 27th, 2026 AT 7:40 AM
Tiny
L177
  • MEMBER
  • 6 POSTS
I do not have any codes, it just misfires, but nothing shows up.
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Friday, February 27th, 2026 AT 7:41 AM
Tiny
KEN L
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  • 55,411 POSTS
Sometimes it takes a while before the codes are set, can you read the cylinder misfire count on your scanner? Also does it misfire all the time or just when accelerating? Can I get a short video of what is going on?
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Friday, February 27th, 2026 AT 8:36 AM
Tiny
L177
  • MEMBER
  • 6 POSTS
It only misfires when accelerating. When it starts misfiring the gas just has no power and it just jitters, not going any faster. Sometimes it loses completely and the gas pedal stops working.
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Friday, February 27th, 2026 AT 8:49 AM
Tiny
L177
  • MEMBER
  • 6 POSTS
I am getting the high pressure replaced today, which could be the issue. Thanks for the help though.
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Friday, February 27th, 2026 AT 8:50 AM
Tiny
KEN L
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  • 55,411 POSTS
Yep, high pressure pumps go out all the time so that can be it, usually it will have a trouble code for it so that part is strange but you never know. Also, I would remove the spark plugs and make sure one or more is not cracked, this will cause the issue you have described as well. Please let me know what happens.
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Saturday, February 28th, 2026 AT 9:29 AM
Tiny
L177
  • MEMBER
  • 6 POSTS
They swapped two of the coils, since the code went off and it ran fine for a bit, but now it still kinda misfires when I hard accelerate onto the ramp. I will check the spark plugs again Thank you.
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Monday, March 2nd, 2026 AT 2:47 PM
Tiny
KEN L
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  • 55,411 POSTS
Yep, it sounds like you may have a cracked spark plug, let me know, Ken
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Tuesday, March 3rd, 2026 AT 9:25 AM

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