Scott A

My wifes 2001 Lincoln LS hesitates and it feels like the transmission is slipping when I put the engine under the lightests loads. Recently started running 93 octane. I have replaced an ignition module on it already, and all are working properly now, but it still shortshifts and hiccups on hills .She loves the car and doesnt want to sell it, but I just am at my wits end on this one.....