Hondata

I also have a b18cr in my 1989 civic. right now im using the 2001 itr map and it runs good! a/f looks good too.might want to go over everthing else cause i dont think thats your problem.

So what are the chances that the s300 is damaged?
Don't want to buy a new ecu if it could be the s300.

So i just bought a new s300 i chipped my ecu and installed the s300. Car started fine,rev'd up fine and idle fine.
I was sitting in in my car had my laptop plugged in learning the system when my car shut off and wouldn't start back up.So i replaced that ecu with a chipped p28 and everything was ...