Wierd sound on boost

[britdog]

OKay so i had stopped at a light and went to get on it after the light turned green. It sounded like something scrapped the ground when i got on the throttle. you could feel it on the pedal and it just sounded like a scrapping noise. i also have a like cracking noise when i push the break pedal but only sometimes you can hear the crack. what is going on?

 

[DSMTyson]

Pull off your intake pipe and check for shaft play in the turbo.

 

[AG 305]

is the noise coming from the motor? check your brakes

 

[4Lurker4]

Pull off your intake pipe and check for shaft play in the turbo.

x2 Even if it's not the turbo, can't hurt to check the play once and a while.

 

[whtgst]

what kind of cracking sound? can you feel it in the brake pedal, steering wheel? is the sound inside the car, or outside? is it louder the harder you push? the other noise sounds like the turbo may be worn out, def agree with checking shaft play. on the turbo.

 

[britdog]

when i get on it and kinda turn a little bit you can here it sounds like underneth the car. you can feel it basically everywhere

 

[Frickadella]

Does it seem speed related or rpm related? It's hard to speculate, but assuming it's speed related, probably a drivetrain/chassis issue.
<ul>
<li>I'd jack up the front end on stands and turn and rotate the wheels (ignition unlocked/out of gear).
<li>Check CV joints.
<li>Pull off tires and check brake system.
<li>Exhaust ground clearance?
</ul>
Good start. Good luck.