Hi guys I have a 200 Pontiac Bonneville SSEi which was running perfect before I parked it on my front lawn and went on my holidays for 2 weeks, I had topark it there because my driveway was filled with fill. When I came back and started it it had a noticeable stumble upon acceleration and a loss of power, it is even more noticeable when I corner right or left then it really bogs down. I put some methyl hydrate and injector cleaner in the new tank of gas to see if it was moisture in the tank maybe, but this had no effect. Any ideas? could it need a new fuel filter? is there a small one on the engine maybe. Any help would be welcome. Also another unrelated problem :-) after coming back from Vegas with 4 adults in the car plus luggage the rear of the car is a lot higher now than it should be, it looks like a hot car and the suspension pump keeps regulating it to that height, ideas? some sensor busted I'm sure someplace. Thanks Les.