What causes jerking at 20n 40mph but stops if I accelerate or let off gas?

What is your question?

Makes no noise, doesn't occur when temp hand is cold but always at its warmed up. Runs great other than this issue.

What makes this problem better or worse?

Whose when engine is warm... doesn't do it at all when engine is still cold.

How long has your 2006 Mitsubishi Endeavor had this problem?

Since I got it 3 months ago