Hi everybody, my 91 XR2 started acting up with this weird problem the other day. It starts and runs great first thing in the morning or when it has sat for a few hours. But after driving it, shutting it off, then starting it again within an hour, it sputters like it has an exhaust leak. It idles fine, and shows no indication that it wants to die, but it's noisy as hell when I accelerate. In the morning, it's like it never happened. Also, yesterday while I was driving it like that, the CEL flickered on and off a couple times. Has anyone experienced this? What should I be looking for? Thank you in advance!