Washboard Rattling

[818Toyotafan]

When driving washboard roads there is a rattling sound coming from the engine compartment. Sounds like the ABS/booster/Master cylinder area ... right behind and left of the steering wheel.

Only occurs when driving washboard roads. Normally, tires aired down to -20psi.

Can anyone point me in the direction where the subject has been discussed?

 

[Trunk Monkey]

Is your engine cover still on?

 

[818Toyotafan]

Yes

 

[Trunk Monkey]

It's likely that, easy to remove and check if that's your sound.

 

[Columbo624]

I had a weird vibration at various times and thought it was under the hood. It was the roof rack cross bars they were slightly loosened, fwiw...