Car shudders violently when driving 45 MPH once it is warm?

KSIDD

MEMBER
2006 FORD FUSION
6 CYL
2WD
AUTOMATIC
135,500 MILES

The first time the check engine light came on and #3 ignition coil was changed. The problem continued. Transmission fluid change was suggested and done. Problem continues. The car also needs a new flex pipe. It was suggested that it was causing a backflow issue. Does this sound possible?

Monday, January 23rd, 2023 AT 6:36 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
50,520 POSTS

This sounds more like a misfire problem; I would replace all spark plugs and the remainder of the ignition coils. Here is a generic guide to help you change out the spark plugs with instructions below to help you with your car:

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

Spark Plug .................... AGSF-32WM

You must remove the upper intake manifold which I have included as well. I would also service the throttle bore.

here is a guide to help you:

https://www.2carpros.com/articles/throttle-actuator-service

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