hello,

i have a problem with my evo stalling randomly, i did the tb seals change and this started.

i read it might be the biss screw that needs to be adjusted before i go on the IACV being bad.

only problem is i have aem v2 and not the stock ecu.. i searched many posts about adjusting the biss using evoscan.

how do i adjust the BISS screw with aem v2? what reading should i look for and what is it set too on the aem?

thanks

 

anyone??

 

Jeff Evans and BD Alchemist have a nice tutorial on setting the base idle for an infinity. Perhaps you can use that to help get the v2 sorted.

 

oh okay thats great...!

 

 

I run a Infinity on my 8. I pulled the IACV out of the IM while still plugged in and used the IdleBasePosition table to max it out and reinstall the valve to ensure its not over extending and noted the # from the IdleBasePosition table down then retracted it and again noted the # down so now you have a Min/Max which I believe mine as 60 all the way closed and 100 all the way open so that tells me at 80 the IACV is in the middle of its travel. Re-install the IACV to the IM and set the entire IdleBasePosition table to 80 which you now know the plunger is in the middle of its forward and reverse travel, at this point after setting the entire IdleBasePosition table to 80 unplug the IACV so it doesn't move (which is the same thing as Evoscan SAS mode that locks the IACV in the middle position). start the car and adjust the BISS screw to your needs, Once its idling close enough to match your IdleTargetTable you should be good to go. Shut the car off and plug the IACV back in and restart the car, Keep in mind any current feedback and or idle trim settings you have currently that may cause your idle to act funny. once your restarted you can adjust your warmer running temps on the IdleBasePosition table +/- whatever you like from your center of 80. Your #'s of min 60-80-100 max may be different. this should help you find your middle # and get your idle base set. Let the car sit overnight and the next morning tune your cold start.

Your Idle setup for the V2 I believe is different than the Infinity but this should get you started. PM me if you need any more clarification

 

damn thats a lot of information... lol but ill try this

 

It sounds very long but it took me about an hour to remove the valve and find middle and get my idle set to about 1200 with those #s. Try those #s and see how it does, it can't hurt. I'm on stock Throttle Body so if you are also id have to think they should be close.

I forgot to add and its worth mentioning, with the BISS all the way out counter-clockwise Iam turned clockwise into the ThrottleBody about 4 turns. I have R2 cams and I'm a 2.2 so my idle is set a little higher