text:  When you're saying, make sure we understand, like 1,500 RPMs, one and a half points? Right. It'll stay at 1,500, and then it'll drop down, and then it'll go back up to 1,500, and stay up there for about a second or two, go back down. And it'll do that for like 10 minutes. Oh, the vroom, vroom, vroom, vroom. And that's the 5.2 liter V8, correct? Right. It's the Limited Jeep Commander 2006. We see that a lot when there's a vacuum leak on the engine.