2014 Kia Rio hatchback,when accelerating fast the front end will shake quite a bit, at lower acceleration, maintaining speed, or coasting there is no vibration
I have checked the CV axles, ball joints, tie rods, motor mounts and wheel bearings. Brand new tires, balanced when they where put on, tread has even wear, the vehicle does not pull to either side. As the vibration happens at all speeds when hard accelerating i do not believe it would be a balance issue. No codes are shown for a misfire. I am quite thoroughly stumped
Cars & Trucks - Kia - Rio - 2014 Kia Rio
Answers & Comments
I would say check for play in any bearings. When accelerating hard you are putting stress/load on bearings. I had a support bearing on my driver side axle for my Accord that had a little play in it. Was very noticeable on road. Mechanic said it was normal play, so I took my car home and replaced it myself. Problem solved.
Also, worn plugs with too big of a gap can mess up under hard load but be fine under slow acceleration.
A high speed " shimmy" is a red flag for a balance or tire problem. Check the treads on the tires for even wearing & ck for balding. PS, after u did all of all of the front end work was it aligned? . start w a rotate & rebalance. CHECK THOSE TIRES!