Maybe starter issue ? in 90 - 00 Lexus LS400 Posted February 13 · Report reply I am not sure about that starter, but the Denso starter in other Lexus models have a rotating contact in the relay mounted on starter. They get burned. when it starts sometime, and not other times the contact is moving to a better spot. This relay (which is mounted on the starter) can be repaired with a Denso starter relay contact kit. The only issue on your car is that it is buried under the intake on back of engine. The kit cost less than $20.