Any idea on why my 2014 Honda Civic shakes for about 30 seconds when I start it up?

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May 11, 2025 at 7:09 pm #1093 Reply
Jennifer
Hey, quick question — anyone know why my 2014 Honda Civic feels like it’s having a mini earthquake for like 30 seconds every time I start it? It’s like the whole car’s doing a weird shaky dance before it chills out. Is this normal, or is my ride trying to tell me something? Could it be the engine? Bad mounts? Cold start drama? If you’ve been through this, drop some wisdom — I’m all ears!
May 11, 2025 at 7:09 pm #1094 Reply
Robert
Check your spark plugs, air intake, and motor mounts. It could be any of those.
May 11, 2025 at 7:09 pm #1095 Reply
Justin
Honda tech here. Does it buck at about 2500-3000 rpm? Those 1.8s like to tear their air inlet pipes and can cause some crazy running issues by letting in unmetered air. A lot of guys mistake it for VTEC solenoid issues.
May 11, 2025 at 7:09 pm #1096 Reply
Mikey
Maybe a cracked motor mount.
May 11, 2025 at 7:10 pm #1097 Reply
Chris
If you unplug your up stream o2 sensor, does it do the same thing?
May 11, 2025 at 7:10 pm #1098 Reply
Frankie
The o2 sensor doesn’t work when the engine is cold, though, so that test may not prove anything. The o2 sensor doesn’t work until it reaches about 500deg. Nor does it work at wide open throttle. Only between those two times it trims fuel. WHEN THE ENGINE IS COLD, THE COMPUTER RUNS ON A FUEL MAP THAT’S PROGRAMMED FOR COLD RUNNING.RICH
May 11, 2025 at 7:11 pm #1099 Reply
Michael
Could be coolant leaking into a cylinder overnight and when in clears out the CYL comes to life. Get it hot and park it. In the morning, pull the plugs. Hold a piece of cardboard over the plug holes and crank it. If there is a wet cylinder, it will blow the coolant onto the cardboard. If It’s clean, then not a coolant issue.
May 11, 2025 at 7:11 pm #1100 Reply
Callum
Manifold air pressure sensor maybe or mass air flow sensor.
May 11, 2025 at 7:11 pm #1101 Reply
David
My guess is older engine getting oil to the lifters, I’d change the oil and switch to appropriate weight synthetic oil and see if this changes it.
May 11, 2025 at 7:12 pm #1102 Reply
William
2011 fiesta, same thing. I was thinking fuel pump bleed off. Try to cycle the key 5x. Or so before starting.
May 11, 2025 at 7:12 pm #1103 Reply
Tee
I have a 2018 Acura, and it does the same, like someone is cradling my car and gently shaking it.
May 11, 2025 at 7:12 pm #1104 Reply
Wesley
If there’s a check engine light on, then it’s maybe nevermind from the throttle positioning sensor mass air flow sensor.

If it doesn’t do it the whole time, then I doubt it’s the motor mounts. You would feel it all the time for that I would say and spark plugs. I don’t know, you got over 100,000 mi on it yet.
May 11, 2025 at 7:13 pm #1105 Reply
Keith
Pull a spark plug and let’s have a looksie.
May 11, 2025 at 7:13 pm #1106 Reply
Mike
Could be a couple of things. Dirty fuel injectors or change spark plugs.
May 11, 2025 at 7:13 pm #1107 Reply
Anton
One of the spark plugs is misfiring. It is easy to test and easy to fix.
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Any idea on why my 2014 Honda Civic shakes for about 30 seconds when I start it up?

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