i get 4 slow blinks and 3 fast ones. this is on a 89 civic with a ls swap. 91 integra ecu. whats the problem?

 

o2 sensor. I had it too.
Check the wires and the grounds (if it has any).
If that still doesn't fix it, take a multimeter, and measure the output voltage. Should be around 0.8V at WOT, and 0.2 if you let go. Idle is usually a bit wacky because ove rich conditions.

If all else fails, replace.

(this is in the manual too)

 

cool thanks