Hondata

this problem only exists with the s300, does not occur with a stock ecu. I have an obd1 4th gen dohc zc, I loaded d16a1 maps on it last night, and at low throttle and about 15" of vac it will loose power untill about 10" of vacuum then it jerks really hard when the injectors cut in again.

I have not changed any settings on the chip except for raising revlimiter. I am only throwing code 9, but this losing power doesnt occur with stock ecu.

in first gear it will jump pretty much hopping, as it cuts in and out much quicker.

Old Car = Check your electrical grounds - gearbox to chassis.

just swapped the zc in a few weeks ago, made sure all the grounds were good. i went over them to double check a few times because i couldnt get it started right away. also injector cut is only with the s300, plug a stock ecu back in and it doesnt happen.

Try calibrating the TPS.