After finishing the install of my hahn turbo kit, I turn the bike on, turned on fine no problems idleing or anything until I noticed that the fi light was on it doesnt seem to hurt the way the bike idles but I have not ran the bike on boost so my question would be is there something that goes inline with the iap sensor or another sensor that would cause this or any info would be great. I did a search on the site all that came up was something about a check valve inline with the iap sensor is this needed I have a check valve running inline with the boost guage to the vacumm line that come from the #1 and #4 throttlebodys just like the instructions indicated. the bike is going on the dyno tommorow so I would like to find out what the problem is.