Have to rock the 2007 RX350 to start it.

[mamod]

Yes you read that right. Occasionally the car will crank but not start. Getting out and rocking the car back and forth, giving it a good shake, gets it going. Loose wire? Starter? Fuel filter just replaced. Has this happened to anyone else? VSC Off and Check engine Light comes on for a while after, then disappears. Had an alternator replaced a while ago. More recently replaced battery fuel filter. Hope you can help!  

[bucephalus]

Starter not properly engaging??

[bazzle]

Vacuum in fuel tank?

Try opening fuel cap 1st.