ok guys i really need ur help. when i first start the car up and drive it it runs really good. then after a little bit the check engine turns on. the car will idle at different speeds, it will bogg and sometimes die out, and the throttle response is bad. I checked the codes and they were: 3, 21, 22, and 23. if anyone could help me out here itd be sooo helpful.
code 3 is: map
code 21 : vtec spool selinoid
code 22 : vtec oil pressure switch
code 23 : knock sensor
by the way before my apexi vafc was installed the check engine didnt come on.

 

who installed your VAFC? did they do it blindfolded? thats prolly your problem

 

that happened to me, before my motor died


i was gettin tha same codes

 

check your wiring for your ecu, i guarantee they messes up by either splicing some of the wrong wires or just leaving them open or cut. someone did this with my s-afc and i had to wire it back right.