so i have been reading about p0505 alot and have found instruction to get rid of the code. from what i understand, you clean it out first. if that doesnt work you use evo scan and under actuators you choose SAS mode. then turn the biss screw on the tb until the car will idle around 900 rpms.

the iac steps should be under 25 at idle correct? i cant seem to lower mine below 35 so i still get the code to pop up very often.

i even ordered a new iac and installed it and cant seem to get below 35 steps at idle.

anyone have suggestions i could try to get rid of this annoying P0505 code?

Some background.

i use to get this code every month or 2 before my recent cam upgrade. took the iac out and cleaned it so i was code free for a few months. i use to run hks 272's and swapped in some gsc s2's a few days ago and ever since then i get the code to pop up very frequently.

am i doing the evoscan process wrong? or am i missing a step?

anyone deal with this before?

 

did you power cycle everything each time too? ie take the batter off and leave for 10+ mins

 

no. did not know that was needed. never heard that before

 

bump

 

did you try setting the biss and the cycling the power?

 

yea tried it last night. light came back earlier this morning

 

i have a prob with mine too. mine fluctuates between 1k and 1.5k at idle. when i drive for a while, then stop the rpms will slowly rev to 2k then back down to 1k then start fluctuating to 1.5k over and over until i start moving again. i had the same code reading, i cleaned my iac, checked it with the multimeter, all good in the hood for like a minute then start doing it again.

 

mine use to do that also. replaced the iac and my idle is smooth and stays around 1k rpm now. its just the damn light that keeps popping up thats annoying me

 

oh, just delete the code lol. Nah, where did you get your new iac? i guess im gonna have to buy one also.

 

I just ordered mine a few days ago from:
http://www.amazon.com/gp/product/B00...ef=oss_product
Cheapest around that I found. No idea if it'll work, but will report back when I have it installed.

 

same one i got--^

it fits like oem except the o-ring is different and bigger. works for me though. my idle is now normal and doesnt just up to 2k. but for some reason, i still get a SES light. so confused, i have no idea what to try next