does the s300 bypass anything over a stock ecu by default?

[DOHCAccord]

Im trying to fix a car i picked up, 99 hatch with a h22 swapped in it. the car has high impedance injectors, obd1 and will only run on my other cars s300. it will not run on a p13 that came with it. my car has a h22 as well with dsm 450cc and a resistor box. the p13 and my s300 both run my car just fine. the only thing thats different is the injectors and resistor box. but from what i know low impedance need a resistor box and high impedance do not. so is there something in the s300 that is different or bypassing something to make the civic run vs the stock p13?

[Luke]

thought about the injector size?

if the P13 isn't tuned appropriate, the car won't run at all.

tune it, have fun with it.

best regards Lukas

[DOHCAccord]

thats been a thought, but im loading the map as 310cc injectors and it runs perfectly, and i find that h22 injectors are 310 to 345, either way the ecu should run them