ok i have a 1994 b18c1 fully built low comp pistons 9-1 ported head stock cams crower valve srpings sk2 manifold stock throttle body this is in a 92 civic cx.Ok the car lopes at idle and if you give it gas it will clear up it is throwing a code 14 iacv well i have replaced the iacv with a brand new one i've checked all vacum lines sprayed them with starter fluid sprayed around throttle body and were the im mounts to the head ive tried ajusting the idle screw when the car is cold and i unplug the iacv and it idles normal about 1000rpm i know it's alittle high but it doesn't bounce up and down but when i give it gas it does that rev limiter sound at about 1000 to 1300 then it clears up . but when the car gets hot and unplug the iacv nothing it idles but when i give it gas i does the same rev limiter sound fromabout 1000 to 1300 thens clears up ive tried changeing ecu's i'm running a p72 obd1 now and iv'e tried running the p28 strill nothing i'm stuck any help would be great thanks

 

ok there is a "cold rev limiter" deal on these engines that wont let it rev past a certain point til the water temp goes up. this could be a rpoblem or it could also be too low of compression but i am not 100% sure

 

yeah i tried lowering the fuel presure alittle but nothing i'm all out of ideas

 

I just installed a Victor X intake mani on my b18c and threw the same code. On the back of the stock mani, there were two connections. One short(which went to the stock iacv and one long). My IACV was possitioned different on the VX so i had to cut and soder a longer wire to make the connection. I am no longer throwing the code but I am still check engine light is still on and it throws code 1 which is my HO2S. Im new to working on any car and I hope this helps you out. If anyone has any help for my trouble-code, let me know. It has been a pain in my ***.