Hi everyone,

Hope I'm in the right category of the forum... However, if I'm not, sorry about that.

I'm facing a bit of a pickle situation here in Switzerland where they are REALLY picky concerning emissions and regulations and all that s...

My car is JDM OEM as it can be, however, seems that the ECU from origin makes a huge injection of fuel on cold start and that makes the CO emissions go really high (50% above limit) at the beginning.

Another guy managed to make his EK9 road legal around here, but he says in a few blog posts that he had to change a resistance / mod his ECU in order to make the car believe that he was more warm than it really was and therefore, reduce the injection of fuel.

Can anyone help me out? Please?

One possibility is to use a Hondata s300 (as I have one and tried to map the freaking thing however I failed massively due to high HC), if someone has a B16B proper map.

Thank you all for your help in advance. Hope I can get this running soon.

Cheers.

 

If you were to go the first route you mentioned, you'll have to measure the resistance of the ECT at operating temperature (use a multimeter), identify the proper pin out from the ECU that connects to the ECT and where it merges back into the ECU. buy a resistor and solder it into a wire going from the ECT pin out to where it goes back to the sensor ground (merges back into the ECU). You're most likely going to lose your engine heat gauge, so watch out for that. Good luck.
If you're going to go the Hondata route, when you get a working map, just go into parameters >> fuel compensation >> water temperature compensation and lock all the low engine load open loop values to 0.