Loyd Posted January 31, 2011 Share Posted January 31, 2011 My 97 ls400 has recently started vibration which comes and goes, vibrates for 2-3 seconds then stops 2-3 seconds then starts again. Does not do it at idle, but asyou start to accelerate it begins. Seems to be worst about 1900-2100 rpms. Does it in park as well as moving. Asked a couple of shade tree guys about harmonic balancer but they don't think so. One said needed a tune up, I replaced plugs, distibutor caps and rotors with no change. Did not replace ignition wires. Anyone have a suggestion? Quote Link to comment Share on other sites More sharing options...
turboomni Posted January 31, 2011 Share Posted January 31, 2011 Maybe a engine or transmission mount. They tend to go at over 100,000 miles. Quote Link to comment Share on other sites More sharing options...
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