I did a mpfi conversion on my 89 hatch dx, went by two different conversion how-to's to double check everything. Here is whats goin on that i have found:
1. when ignition is turned on, main relay chattered
2. fuel pump came on but didn't kick right back off after press. build-up(new Walbro)
3. fuel flooded cylinders 1 and 2 which hydro-locked the motor.
4. Check engine light come on with ign. but stays on and there is no light on ecu(in my other car, the light on ecu flashes as soon as ign. is on)
5. tried 2 main relays and both chattered when activated.
6. wires A3 and A7 harness side go to nothing according to bothe sheets i looked at, but both had 12 volts ign. power on them.

Can anyone please shed some light on this for me.

 

thanks for the help guys! Turns out it was an injector wired wrong and a bad main relay. the guys at hondaswap helped me out.

 

You're welcome. BTW, next time you post with a question, you may get a better response from people knowledgeable about the specific subject by including at least a hint of it in the title. Example: "MPFI conversion and chattering main relay help needed".