conboracing

Hey just a quick question with anyone that has aem ems experience.

I bought a 01 s2000 a few months ago. It came with the aem ems. The car has headers and a no name intake.

I want to go back to the stock ecu to see if i get better gas millage for now will i have any issues ? and if later on i decide to put back he aem ems

will I have any problems ?? Or will it just be plug and play ? thanks in advance for the replys.

Round 3

plug and play. unless the ecu is from another car then you'll have to worry about the keys or reprogramming.

H22toF20

Is their a wideband installed?