i was at the strip an had some bad wheel hope after that my check Eng light came on i wasn't able to ind any probs and then later in the day the car started to stuter at 2225 RPM in any gear. This mornin its stuttering at 3000 RPM and not at 2250 RPM ??? i checked the comeputer and its a CODE 9 now what is that mean

this is for a all stock 89 CRX si

everything in the dash is working fine car idels at about 600 RPM no can't see anything wrong no leaks no smoke ??