2007 RX350, 3.5L V6, 220,000 miles. I’m having issues on start up. When the motor is cold (left sitting for a while) it will usually start up even though at times it shuts off once and then have to turn it over a second time. If the motor is warm though (out running errand, on and off) there’s roughly a 50/50 chance of it starting . Also just noticed today that when at higher speeds and try to accelerate I don’t get much power, motor revs but now power which leads me to think vacuum. I’ve already replaced the fuel pump and cleaned out the throttle body. Any help or suggestions would be great!