I have a 92 ls 400 with sluggish power and when you try accellerating all the dash lights start flashing, at idle everything is normal.
Check your main power and ground connections, then have your charging system checked it maybe overcharging. As far as sluggish power it could be a restriction in the exhaust system.
Search Lexus LS 400 Questions
Lexus LS 400 Experts
Related Models For Sale