My 87 Brougham is giving me a problem and I dont know what is causing it. Around 50-60mph (sometimes at lower speeds too) it feels like the engine wants to stall kinda feels like its bucking a bit. If I give it a little more gas it seems to go away but then does it again when I slow down. I really have no idea what this is. At first I thought maybe it was bad gas but then I refilled it with 93 octane, changed the fuel filter and the problem persists. Have any of you experienced this or have any idea where the problem may be?. Thanks for any help.