New battery installed runs very rough?

BURDOCKK

MEMBER
2015 TOYOTA VENZA
3.5L
V6
2WD
AUTOMATIC
68,700 MILES

Hello Support,

The new battery came from a Toyota dealership, and my car runs terribly, when I had the old battery, I could not charge all the way up. Even though it still made the car run great as always the Toyota guy said I just need to run car a few miles I have been over a 100 miles still runs terrible just because I changed the battery.

Need help badly thanks.

Monday, April 14th, 2025 AT 9:16 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
54,144 POSTS

I assume the car run good before the new battery, correct? Can I ask if you have a check engine light on while you drive? When you say it runs terribly do you mean the engine is firing or is it stalling at idle, or just idling rough? I need more information to help you, in the meantime please go over this guide:

https://www.2carpros.com/articles/repairing-engine-rough-idle-issues

Please upload a short video of the problem so I can see. Please go over this guide and get back to us.

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Monday, April 14th, 2025 AT 12:49 PM

BURDOCKK

MEMBER
2 POSTS

Hello Support,
I took the video, but it did not come out on my phone.
So look for a video tomorrow, keep yor eyes open.

Thanks,
robert

PS.
The car ran good before the new battery correct.
No check engine light on no time.
When I say it runs terribly, I mean the driving
dynamics, the more so bumpy ride think potholes

I really appreciate the information
I use to do a little mechanic work
enjoyed it.

Thanks,
again

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Tuesday, April 15th, 2025 AT 1:57 PM

KEN L

MASTER CERTIFIED MECHANIC
54,144 POSTS

It could be a tire has come apart internally, but I am not sure with the information I have, "driving dynamics, the more so bumpy ride think potholes"? Do you hear noises as well? Looking forward to the video.

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Thursday, April 17th, 2025 AT 8:45 AM