j.....it won't miss like a car running on a few cylinders. If it's the pump they are talking about, it will buck, have power, not have power sort of thing. If it is doing that, there are how-to's and threads on here that talk about it. It is a common problem, and an easy fix, if you are handy. That is why I asked if it were an SRT6...two different cars with different problems....send the egr valve back for a refund...won't work on yours.