well the distributor rotor screw fell out of the distributor and caused the car to die. well i fixed that and now the check engine light comes on only when i'm on the highway. well i was just wondering if anyone could tell me how to read the trouble codes off a 91 civic Si and what the codes are. thanks in advance

 

Pull up your passenger side carpet at the firewall. See that gold plate with the little hole in the middle of it? your ECU is behind it and you can see the LED that flashes the code through the hole. Look at the hole and turn the car to on (don't start it) and then count how many times the LED flashes...then go buy a shop manual (even the crappy ones at pep boys for $12) and it will have a list of what the code is.