CM871 rocking back and forth at idle

[Pete379]

I second what Rawze said about the programming. When I purchased my Pete with an 870 it had a tune that caused it to act the same way as you are describing at idle. Maybe it's worth a pm to unilevers he got mine taken care if. If I remember correctly he said that it was getting too much fuel and then trying to cut itself back which caused a shake at idle almost like it had a performance cam in it or something