hello guys i have to replace my engines wiring harness AGAIN i ended up putting the wron one in and well this would be the 4th time pulling the motor i really wanna just take off the intake manifold and swap harness's in car



does anyone know how to remove the manifold while engine is still in car

Just unbolt it and push it out of the way. I don't think you can take it out without pulling the motor.

I heard it's possible without removing the motor...

its possible put a pain in the @$$ to take out!

It can be done, I did it. Service Manual is available here on SL folks.
Follow the knock sensor replacement section, and you can remove the intake.

http://www.scionlife.com/tech/manual/?manual=tc05_1284