Been looking for reasons my N/A has a stutter at 3500k? been reading and looks like most people suggest the injectors.( having them cleaned/new) I actually do injector cleaning and have tried flowing cleaning and re-flowing and there running just like they should be, any ideas of where I should be looking now?

 

commonly called the 3800 RPM hesitation.
It is usually due to poor grounding on the harness,or ECU or coils.

 

To correct this, our wisened friend Aaron Cake has authored this guide. Follow it to the letter for worry-free grounds. The only addition I could make would be to put the main chassis ground back in from the wheel side. Makes replacing the ground cable easier by giving you a stud to hook it on.

Proper RX-7 Grounding Procedures

 

Thank you! I had read about the grounding issue many times but bag also read in multilpal places my year and being an n/a auto I wouldn't have to worry? But in all reality that's an easy fix and I'll get on it!