ok i got a 91 civic si with a jdm b16a , and its coming up with code 4 which is ckp (crank position sensor) and code 23 which is the knock sensor.. but the cel only comes on when the car warms up.. any one have any ideaS??

 

I do. If the both codes only come on when you warm the car up then you have a bad distributor. You can get away with taking apart your distributor and changing just the sensor if you have another distributor lying around. As long as it is a honda dizzy the sensor will fit. It may be the cause of the knock sensor code. It could also be a faulty sensor or poor quality fuel. Fix the distributor first. If that doesnt clear the knock sensor repost or pm me.

 

oh i got plenty of old honda dizzys layin around.. and any ckp sensor will work??? and i always run 93 premium gasolina

 

Yea All 3 sensor in the inside of the distributor are exactly the same but you can use the one with the correct colors. I think the sensor you will be replacing is the one with orange and white wire but pull up a schematic just in case im wrong. You didnt do the dpfi to mpfi swap did you?

 

nope car is a si and its a flat sensor i no wut it is ill get back to u on that.. im just probally gonna take my brothers dizzy for the day hes got my cars twin

 

What would be the problem if the car is throwin code 4 ckp and you did a dpfi to mpfi swap? My cars a 1990 civic std hatch wit jdm b16a swap. This is the only code im throwin and motor wont rev past like 3k because of this. Any input would be very helpful so i can get this beater done!!! Thanks

 

worst problem ever

 

And that would be what exactly???

 

You pretty much hijacked this guys thread.
Anyway, try switching the white wires around.