I did an ls swap into my ef hatch about a month or two ago and it runs and drives great, but when I start it up, it will idol high and as it warms up it will start to quickly flux between 400 rpms and 1100 rpms. It will do this every time I put my cluth in or go into neutral. It doesnt seem to be effecting the running of the condition, but it is super annoying and it is making it hard for me to sell the car. Can someone help me fix this? Thanks.