Well with the Civic EX harness and a JDM ITR motor the IAT on the throttle body is a different shaped plug. I left it unconnected and I never had a CEL but my question is would it be putting the ECU in limp mode but not throwing a code? Are the JDM IAT connectors the same as USDM for all B series?

 

If it's not throwing a code then your ECU would have no reason to go in limp mode.

edit- Are you running the stock EX ecu...?

 

no JDM ITR P73

 

Lol okay just making sure, yeah no reason to be in limp mode without a code.

 

so is it not affecting performance being unplugged?