Ron Kn Posted December 18, 2010 Share Posted December 18, 2010 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? Quote Link to comment Share on other sites More sharing options...
landar Posted December 18, 2010 Share Posted December 18, 2010 Exhaust system, maybe? Check for loose hangers, mounts, connections. Quote Link to comment Share on other sites More sharing options...
steve2006 Posted December 18, 2010 Share Posted December 18, 2010 Exhaust system, maybe? Check for loose hangers, mounts, connections. Also check the EGR pipe for fractures and the wheel bearings maybe Quote Link to comment Share on other sites More sharing options...
curiousB Posted December 18, 2010 Share Posted December 18, 2010 just when you accelerate or at steady higher speeds? If at steady higher speeds than could be wheel bearings or just cheap tires. Quote Link to comment Share on other sites More sharing options...
landar Posted December 18, 2010 Share Posted December 18, 2010 Rear differential, drive axles, maybe? Just turn the radio up and hum along. B) BTW, Ron...welcome Quote Link to comment Share on other sites More sharing options...
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