Humming Sound In 90 Ls

[Ron Kn]

I recently bought a 1990 LS 400. Great shape, but has a fairly high pitched hum when I accellerate at highway speeds. Anybody esle have this noise in their Lexus?

[landar]

Exhaust system, maybe? Check for loose hangers, mounts, connections.

[steve2006]

Exhaust system, maybe? Check for loose hangers, mounts, connections.

Also check the EGR pipe for fractures and the wheel bearings maybe

[curiousB]

just when you accelerate or at steady higher speeds? If at steady higher speeds than could be wheel bearings or just cheap tires.

[landar]

Rear differential, drive axles, maybe? Just turn the radio up and hum along. B)

BTW, Ron...welcome