Anyone wanna give me alittle help Im starting out with this aem ems thing. I have tuned my WRX rally car with a possum borne stand alone, so i have a little experience. I have a 04 evo 8 with the MAF I am using the calibration from Aem and i am haveing problems with the idle, i believe i might have a bad ems it doesnt seem to control the IAC at all. It starts and runs when it warms up the idle jumps up to 2000 and revs. I have tried to add a ton of fuel thinking i was way lean. I ran it all the way up to 10 AFR the idle comes down just not all the way and if it does it then it stumbles from being so rich. Does any one have a good MAF calibration they wanna give me before i send the EMS back to have the IAC checked. Thanks

 

I think most people are using speed density. But for some reason i am hearing alot about the IAC problems. Have you checked the AEM forums? There is atleast 1 recent thread about your problems.

 

yes i did the aem forum and i contacted aem and as soon as i told them the problem they said ship it back, it was alittle to quick too. they much know of the problem i just wanted to double check and make sure im not missing something easy