Hello I recently bought a 2007 awd is250 with 236,000. I wanted something to work on on myself and I needed a car. So far I've replaced all but one cv axels. Replaced rear lower bushings for the rcf ones. The car has been neglected and I'm working to get it back to par. Recently I did the walnut blast for the intakes they were disgusting. But when I go to start the car once I put everything back today I won't crank. Starter engages but the motor doesn't turn over. I made sure to close the valve I was working on while blocking all other off. Manually closing turning in a clockwise direction. I used brake cleaner in the valves cleaned with a brush then sucked the brake cleaner out with a turkey base next I walnut blasted with a vacuum. Is still researching but I already see I was supposed to remove to spark plugs, didn't do that. Any advice would be much appreciated. This is my first Lexus/Toyota I'm from the nismo world. Like the car just trying to learn.

 

Lets clarify. The starter engages and the engine turns over at a normal rate but does not start and run. Is that correct?

It's likely the some debris went into the combustion chamber and possibly fouled the plugs.

I would pull the accessible plugs and inspect them and clean and inspect your work. The cold start injector should have fuel available. Make sure it does.