Thanks all of you,
I was facing this problem and I was completly fedup
First I replaced all spark plugs and coils for left side of engine nooooo sucess
Second I change thermostat and engine temperature sensor again no sucess
I read this post and was very helpful I fixed my 2000 lexus es300 and woooow it was working very smoth
I replaced only one but planing to replace other as well.
For those who