I had that problem to. My needles were set too far apart. Something like I was way off, too rich on the high end and I compensated by accidentally running the low end too lean and vise versa.
If i screwed it up bad enough, the car would run ok, but was sensitive to everything especially the body being off or on.
I reset to factory and retuned, this time with a less heavy hand on the needles. With the right tune it went away give or take 20 degrees.