alright well i decided my si crx wasnt as fast as i wanted it so i wanted to put an zc ecu in it but i ended up getting a ls ecu. so i put that in and it worked good. except that it idled around 1 1/2 and to 2 thousand rpms all the time. than i took it on the highway and the check engine light came on and the code was 43 the fuel supply system. does anyone know y that happened and how it could be fixed.

 

Switch back to your stock ECU and see if the code goes away.

If the code comes up on the stock ECU then get a service manual and trouble shoot the fuel system.

 

i put the stock ecu back in and it went away. but when i had the ls ecu in it. it felt like i had more power. so is there anyway to fix the problem with the other ecu. or should i just go and try and find an zc ecu

 

it might be that your're running too rich on gas b/c the ls needs more gas to run. my friend had the same problem but reverse. he had a cx ecu in his ls hatch. he ran too lean on gas. i'll ask him what he did and get back to you

 

alright thanks. just let me know what he did.