Vibration at Idle

[ScreaminDuramax]

My truck has a really bad vibration at idle. Enough to rattle the bumper pretty loud. If I just barely touch the throttle, im talking 20 RPM, it goes away. Im not sure what it is because you cant feel it in the cab. But when you feel the engine, its vibrating. This started happening after my twin install.

 

[clrussell]

Down pipe against cab/ frame is my bet.. Mine did the same

 

[ScreaminDuramax]

Okay, ill check that tonight after work, I did a quick check of the exhaust but couldn't see anything hitting. I might just take the exhaust off the turbo and see if it goes away

 

[ScreaminDuramax]

So its not my exhaust, even though my exhaust is vibrating like crazy at the tail pipe.
But nothing is touching and the exhaust is hanging freely. Im beginning to think its my solid motor mounts

 

[Chevy1925]

So its not my exhaust, even though my exhaust is vibrating like crazy at the tail pipe.
But nothing is touching and the exhaust is hanging freely. Im beginning to think its my solid motor mounts

nailed it. change your tune to raise the RPM at idle to where it stops vibrating and see if you can live with it then.