i also have a zc motor and it keeps bogging bown i the low rpms i put new plugs in it but it still is boging down im thinking it might be the injectors or somthing else i dont know also my buddys selling me his type r injectors because he had to get 440 for his turbo setup would they be good in my na dohc zc

 

dont know the size of type R injectors but makes ure they match your stock ones(cc's) if you use larger ones you have to re-program your ecu, what ecu are you using?

 

For some reason I've seen a lot of ZCs slip a tooth on timing. I hope that's not your problem but just throwing that out there.....

You don't need bigger injectors. And it's unlikely that all 4 injectors would foul at once.

 

ive seen that happen on the SOHC a couple times. check your valve timing? and ive heard something about some JDM ecu's having problems at low end.