Good afternoon all,
I am new to the forum and would really appreciated some advice with me 99 WJ. I recently got the dreaded Check Engine light and ran the code. It came up with P0505. So I Google it and saw somewhere were it says, "replace IAC". So I do. I replace the part, have Autozone remove the fault code. 4 days go by and the Check Engine light comes back on. I did notice the rough idling at start before and even after I changed the part. So then I start thinking maybe I need to reset the "Computer" So I disconnect the battery and waited about ten minutes. I am still getting the fluctuating idle on cold starts and minor fluctuation on warm starts. The Check Engine light has not come on, YET. I reset the computer today. So maybe after a dozen starts or so, it will recognize it, and come back on. I don't have any idling problems when I drive it, nor do I have it when stopping at lights. I have searched the forums for related posts, I found some similar posts but nothing that I have found to be relavent. I have checked for vacum leaks and found nothing. Your help is greatly appreciated. Thanks!
p.s. I am no mechanic but love to work on my cars