Rear Suspension bounce?

Tiny
SIXTY6GTO
  • MEMBER
  • 2009 MERCURY GRAND MARQUIS
  • 4.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 32,400 MILES
The car has a very harsh ride but sits level. I believe the rear air suspension is holding air, but every small bump makes the back end bounce up and down. I do hear the vacuum pump runs for approximately 5 seconds prior to each engine start up. The car is the ultimate edition.
Thursday, February 20th, 2025 AT 6:06 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,251 POSTS
Does this car have 32,000 miles on it? If not, I would say the rear shocks are bad or have come loose from their mounts. When the car is not moving can you push down and release on the rear of the car does it bounce up and down? If so let's look at the shock and then replace them to see if the mounts are all good. Here is how. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Friday, February 21st, 2025 AT 10:42 AM

Please login or register to post a reply.