try to get all the power from 13b msp. so decide to remove throttle body coolant hose . hope to get cooler intake air but had none stop issue. on the way to track . my car start develop miss fire at arund 3-5000 rpm the car was runing pig rich too , i use almost whole tank of gas to track that i normaly only use 1/4 on this track day. first session muti P0123 P0172 P0223 code and the worse . on sec session it loose all the connection while i am on track, you can sse in the video.... at 12 sec mark
but after i hook back the coolant hose at track, it was all ok again so weird

You Tube

 

Did you disturb the wiring while removing the coolant lines, or get coolant into connectors? The codes point to that. Also you continued to run it on track in that condition? wow

 

Not as bad in session 1

 

street tires suck, lol.

plenty of people bypassed the TB coolant without issue. Those codes are almost always the TB and in theory it should probably go into limp mode. If coolant got into either the wiring connector or TPS electronics then that could be the issue. And then maybe it dried out with some heat cycling and hot coolant running back through it? Either that or the TB has issues that might only show up when cold, seems like a wild-guess long shot though.


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Is 2 years old Dunlop Z3 used , This Track day is fun type , thats why i am using old tire and carry passenger

At lunch brake, I clean the Connector around TB
Reset the pcm, is little bit better but still throw code out, and car still feel weird

After coolant line hook back up,is been trouble free in afternoon session and this few day

 

maybe try disconnecting again and be careful with towels to catch any spillage and see what happens.

it would have to be the used TB if it’s just hot coolant hooked up or not.

 

I would be shocked if the coolant flow through the throttle body has a measurable effect on intake air temperatures.

 

is your TB hooked up to the coolant system?

 

It's not, but the reason is not because I'm chasing some non-existent charge cooling effect to find 0.1hp. Purely for convenience.

 

yeah, there’s more to it than that though when analyzing the system as a whole and small things add up. I’ll spare the details, but on that point we don’t disagree.