I think you are on the right track with injectors. You need them professionally clean, not by an additive. Clean the throttle body as well.
Another issue with toyotas was carbon build up on the intake valves. A top engine cleaner done by a shop can be done to see if it helps. In a lot of cases, removal of the head and a valve job was the answer as carbon absorbs fuel cold and after it warms up, it will run ok.
Get a shop to verify this for you.
June, 10, 2012 AT 6:25 PM
Any trouble codes?
June, 10, 2012 AT 6:45 PM
And it "consumes" oil (no leaks that I could find).
Thanks for the help!
June, 10, 2012 AT 6:55 PM
Multiple misfires. Check the engine compression and valve clearances apart from what Roy had recommended.
Oil consumption would often create a lot of carbon deposits if the intake valve seals are bad.