i have also a knocking noise on my Fiesta st 2008 and have discovered that it is the handbrake cable underneath the car between the heat shield and body of under center of where your handbrake is.The heat shield will have to be removed as what happens normally the hand brake cable comes loose and rattles against the heat shield when accelerating & deceleration... really annoying!
I would check the suspension bushings, if one of them is worn it would cause a knocking noise.
The guy in the trunk.
possibly worn shock absorber rubbers,loose mounting bolts,broken mounts. more info needed to diagnose
Could be a bad strut or shock No I have disconnected both rear shocks and knocking noise is still there whilst driving. Seems to be coming from rear. When stationary I can bounce rear of car up and down and hear noise with handbrake on but not with handbrake off. Any ideas?
If the noise is coming from the rear then the bushing is broken.
You probably need your bearings repacked
Can be a number of things, the first thing to check would be the Subframe Bushes
The knocking that you are describing reminds me of a stuck universal joint. A bent axle usually wears tires out very fast more than making noise.
I found my noise wasn't something loose. It was the rear strut was bad. Was more of a load squeak that sounded like something knocking.
rear a/c blend door actuator bad [broken plastic gear]
Suspension mounting rubber needs replacing.
Noise coming from engine in Oldsmobile Cutlass could be as a result of an oil leak in the rear of your engine. This makes the gears to wear off leading to severe knocking noise.