Your mother-in-law is sitting in the passengers seat.
It's lean.
You need to take it to a Repair shop and have them scan the computor. A lean condition will cause it and will also damage the catalytic converter.
It's lean.
It sounds more like the uper control arm bushings.
The motion of a passenger leaning backward when a bus starts to move is an example of inertia. The passenger's body tends to remain stationary due to its inertia when the bus accelerates forward, causing the passenger to lean in the opposite direction.
Check for vacuum leaks.
Centrifugal force
It's lean. You have to figure out why.
put ya arms out front, lean side to side.
The front wheels on a 1994 Ford Ranger lean inward due to the camber of the steering alignment. Adjustments can be made at a local tire shop.
Oxygen sensor stuck lean.
Sounds lean.