[fliprayzin240sx]

K water temp sensor, which one did you replace of the 2 sensors? Just gotta make sure you changed the correct one. 2 prong sensor (should be the one on the left if your looking at the 2). If you did change that one, did you use a brand new sensor? Look up the FSM on how to check it them and make sure theyre in spec.

Boost problem, did you replace the damn actuator yet? Double check the vacuum line to it, change the actuator. With the actuator off, make sure the flapper opens and not rust welded shut.

PS: Stop flogging the car with 20 psi boost spikes. Thatll be the fastest way for you to fix all your problems because you will be buying another set of engine when you blow this one...