weird sound from the front

[Benltr]

Hi guys,

Saturday i was doing some passes at the local drag strip and on the last run between the 1/8 and 1/4 i had some weird noise shake on my gas pedal.
Yesterday i did go again to the strip and it did all day at the same spot. The thing is that when i hit a road bump or the engine revs or shift it does it even if I'm not 100% trottle. It does it too when I'm completely off trottle and hitting a little bump.

It sound like its coming off the front and you definitely feel it on the pedals.
WHat it does is like some shaking with a sound of something loose or touching. It kinda makes the dash doing sound too.

My guess is something in the front steering parts since i'm doing a lot of 1/4 mile passes. But to feel in the pedals???

2wd or 4wd doesn't matter... Big tune or small tune doesn't matter too.

Transmission shifts great.

ANy ideas?

 

[Harbin_22]

Could be DS IC tube touching part of the brake system.

 

[Benltr]

Could feel it on the gas pedal too?

 

[Harbin_22]

May be resonating through the entire firewall on that area. Stock motor mounts?

 

[Benltr]

Yes stock motor mounts. They were checked like 2-3 weeks ago max.. and everything seemed fine.

Ill definitely lift the front of the truck tonight to check any play with the wheel.

 

[Harbin_22]

Look hard at the ic tube too. Maybe have someone brake torque it while you are looking at it. my stock mounts let the motor move a lot

 

[x MadMAX DIESEL]

You can feel in in an electric gas pedal?

 

[Harbin_22]

You can feel in in an electric gas pedal?

Kinda why I am thinking it is something touching the firewall

 

[Benltr]

here is the sound :

http://www.youtube.com/watch?v=LQK1AaKvT2M&feature=plcp

raise the sound up

 

[Harbin_22]

Can you make the noise while brake torquing it? Should be easy to find.

 

[Benltr]

i can have the sound while decelering with 0% trottle or hitting a little bump on the road.

Barely everything that can create some shaking make the sound appear...

I will test the brake torquing in 45 min when i go out.

 

[Benltr]

I brake boosted on Drive till 2000 rpm (approx 20 psi) and nada.

No sound at all.

Thats why i didn't hear it till 3/4 of the track.

After having a friend checking the motor with the hood open, it seems that its coming from the inside since he was not hearing anything at all near the engine bay.

I just don't know lol...

 

[Benltr]

Harbin was right.

The AFE intercooler tubing was touching the hydroboost and that was causing to vibration in the firewall.

The boot popped in a run at the track and thats how i found the problem. I put it right back in place and no more vibration.

The only thing is sometimes when i put reverse it does it like 2-3 second. I'm trying to figure if i could put something on the tubing like a rubber or something to absorb the vibration... Any ideas?

 

[SSchmi5519]

Cut a piece of heater hose? Or buy trick heat wrap and wrap your IC tubes!

 

[Benltr]

Yes, heat wrap might do the trick... excellent idea.

The only thing that makes the noise is the metal on metal vibration so with the wrap i guess it will be ok..

If not i might glue some rubber hose on the corner of the hydro.

thank you,