Changed engine oil and overfilled it, my car now jerks sometimes?

ACRAWFORD2023

MEMBER
2003 TOYOTA 4RUNNER
4.0L
V6
4WD
AUTOMATIC
226,565 MILES

Me and my friend changed my engine oil but somehow overfilled it, my car now jerks sometimes trying to go into first, the RPMs will go to 3,000 before shifting sometimes. It does the same in reverse. When I go into second and third the shifts are smooth and the car drives fine while in higher gears. Could it be a problem with my spark plugs or coil packs?

Friday, November 11th, 2022 AT 4:59 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
51,648 POSTS

Yep, I think this can be a coincidence and when you are feeling it is an engine misfire. I would replace the spark plugs and coils.

Here are two videos to show you how:

https://youtu.be/tdnB4jaGSig

And this generic guide can help walk you through the job:

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

Recommended Spark Plug
DENSO made .................... K20HR-U11
NGK made .................... LFR6C-11

Torque .................... 18 Nm (13 lb-ft)
Gap .................... 1.0 - 1.46 mm (0.039 - 0.047 in)

Please let us know what happens.

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Friday, November 11th, 2022 AT 11:22 AM