yes i have used the search function already.

93 civic lx. was a d15 automatic, i swapped in a d16z6 with a si tranny.

im using a p06 chipped ecu.


when its cold and i start it, it idles rough and i get either a code 5, and a code 10. OR a code 15. i can't tell.

when its warm, i can restart it and the code(s) go away.



when i rev to 7500 in neutral, i get code 21.


anyone have any ideas?

 

first a question for you...why are you revving it to 7500 in neutral? thats pretty stupid if you ask me

second.

there is a post here that shows what each code means, it is stickied at the very top of the forum.

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-pull-cel-d4-srs-abs-codes-code-lists-1901557/

thats where you need to start. with the codes.

you have a iat code (10), a map sensor code(5) or ignition output signal code (15), vtec spool solenoid code (21)

you also need to get a p28 ecu since it is the correct ecu for your motor.

and automatic p28 can be found for cheap and easily converted to manual