Ok i have a problem and i really hope someone can help me out. while i am driving my car starts to vibrate around 50 mph and the faster i go the stronger the vibration gets and its like a pulsing vibration. It keeps my car from going any faster than 90 mph and if i let go of the gas it feels like the car is about to vibrate apart. Can anyone tell me what this might be? Like i said it starts around 50 but below that its fine.

 

are you tires balanced? What suspension mods are done or recent service have you done to the car

 

When did it start doing it? chances are you lost a wheel weight.

 

sounds like a balancing issue to me. Also another super quick check is to check your front tires tread, and see if it's warn down on the tread on any side of them, if so that is likely the cause. If not then balancing or perhaps camber/caster could be at the wrong setting and could need an alignment!

 

thanks i will def check the tread but i did have the tires balanced recently and it did vibrate before and after with no change. its like i have a messaging chair because the vibration is so quick.

 

could be worn u-joints or driveshaft unbalanced. Really need to start with tires and alignment and go from there

 

Does it just vibrate while driving or does it vibrate when you rev it up?

 

Well on a quick note I forgot this happened to me before, I got under the car and checked the driveshaft and noticed the bolts where lose, go under there with a 12mm 12pt and make sure they're tight

 

Lol he said it starts at 50mph kinda hard to do that while just sitting there reving.

 

he is asking a valid Q. if it does vibrate while revving up in neutral its in the engine if not then probably tires. its just one quick test to do.