so my check engine lights been on sence i bought my car its a 94 civic hatch wit built gsr and the engine light was on for the iacv.. so i went to acura and bought it 275 dollars later and it still idles the same 1100 to 2000 rpms. i scand it the other day and i got 4 codes now.... 3. map, 10. iacv 14.iat and 23. knock sensor... i swapd out the map and iat and nothin ..... please help thanksss

 

what ecu are u using

 

All of your codes are from the sensors on and around the intake manifold so some wires may be mixed up. Check the wiring and make sure each sensor's wires lead to the correct pins on the ECU. Check the wires with a meter to be sure there are no breaks between the sensors and the ECU.

 

I dont think the GSR has a knock sensor (maybe?) so number 23 wont go away without some hacking. And if you replaces the IACV did you happen to reset your ECU afterwards?