I have a jdm gsr with a full race turbo kit on it. Its set at 5 lbs of boost right now, when i spool it up it hauls ass, then the check engine light comes on and i lose a lot of horsepower. Im not sure why the check engine light comes on and why it cuts my hp down so much? If anyone knows it would help me out a lot thanks.

 

you sure its at 5 lbs? could be the map, check the code when it comes on

 

could be so many things, pull the code and go from there

 

what fuel management are you using? if you just bolted it up than that could explain the prob. also if you don't have a map sensor check valve (some companies call it the "missing link") then get one. your map sensor might be reading boost, which hondas don't like, and the ecu puts the engine into safe mode.

 

when using a vafc tho u dont need a missing link....why?

 

iunno.....i still used a missing link even tho i had a vafc.

 

could be o2 sensor or your map sensor is reading boost and i know when my map sensor read boost on my ls turbo setup my car ran like asshole

 

I have a missing link to stop the car from reading boost, but i guess it might not be working right, i just put a new O2 sensor in so i don't think thats the prob. im running a fmu right now

 

vtec is fucked.

get a new one.

 

how is my vtec fucked?