Hello so I am in the middle of taking all the air ducting out of my car because mice got to it and the only days the car moves is when its perfect out and don't need ac or heat. So I am now down to the heater core and the lines going to them, I traced them all and they go through the throttle body? is there a reason for this other then heating the air in the intake? then a hose goes from the exit point on the throttle body to the lower intake, can I bypass all of that bs and hook the water pump up to the lower intake since it doesn't need the heater core? or is there a real reason for going through the throttle body on a tpi engine?

 

Anyone? I am probably going to finish tearing everything a part today so any input helps

 

If you don't want heat, yes you can remove and plug all of them...
Plug the intake...
remove the intake-to-TB hose. This was to prevent throttle icing in certain conditions.
remove the TB-to-diverter-valve hose.
remove diverter valve.
remove hoses to/from the heater core.
Remove hardline on frame rail.
The return line should go to the radiator, which needs to be capped.

However, if you have the factory KC4 oil heater/cooler, and want to keep it... Run a hose from the intake (supply) to the hardline near the damper on the passenger side... in place of the hardline on the frame rail. Finally, keep the return to the radiator.
Picture showing KC4 oil cooler plumbing...

 

I don't think I have that, but I did research this morning and figured out what it was for and that people were routing it around the tb as a free mod as after driving for a while it warms up a bunch and can be worth 5+hp but now I have the heater core and everything out now just time to clean fill holes and put everything back together! Thank you though!