When accelerating from a dead stop it seems like I have to give it a lot of pedal to get the car moving it feels like an anchor. I realize this is a heavy car but our 1992 non supercharged picks up and goes quite easily. Could this be due to the supercharger on the 1997 SSEI ? I have noticed when cold too that the boost gauge fluctuates slightly when sitting at idle. I seem to be using a fair amount of fuel in the city without driving hard. I just changed the fuel filter and oil change and coolant flush thats it since I bought it 2 weeks ago. Any suggestions would be appreciated.

do you mean the rpms go up but the car doesn't move, or you press the gas pedal and the rpms don't move

Thanks for the reply Its kind of hard to describe but I just think the power from a start is low the rpms seem fine I'll have to monitor it more closely but if I punch it it flies, just under low power it feels like it need a fair bit of throttle to get it moving and fuel consumption seems a bit high.The car is new to me so I'm still getting used to it.I am really curious why the boost gauge fluctuates when its cold with no throttle applied?

The boost gauge fluctuation could be as simple as an old vacuum line that'* leaking. What you've described is something that my Bonneville is afflicted with as well - though I'm inclined to think that mine may be more likely a voltage irregularity. Sometimes it will stand straight up at 12 O'Clock when I start the car (and treat that position as it would the -10psi marker) - that happens more often when I have the accessory position on the ignition engaged for any length of time before starting, instead of just going right into the start position.

Your description of having to give it tons o' throttle to get moving sounds like worn clutches or a slipping torque converter.

How'* the transmission fluid look? Smear some from the dipstick onto a white rag...is it nice and red and "sweet" smelling, or sorta brownish and burnt-smelling? Any little black particles?

Perhaps do a stall test: parking brake on, left foot holding the brake pedal down firmly; put it in Drive, and press the accelerator quickly just until you hear a "groan" or "creak" from the tranny and note the rpm'* on the tach...then let off the gas (and put it back in Park). You should be reading around 1800-2000 rpm on that test. Significantly higher and you're TC may be shot.

(Note: Stall testing like this can be VERY hard on the TC...do it quickly, and only once )

Thanks for your replies so far none of the suggestions apply to what is going on but I do appreciate your input.

When did you check you rear brakes last? They could be hanging up.