I have been having trouble starting my 2003 Park Ave. Ultra for awhile now. No SES light on, just have to crank for awhile before she starts. I have replaced the fuel filter. Thinking it may be a FPR issue but there is no smell of gas in the vacume line. I have noticed that it seems less hesitant to start when the tank is full. Not sure if it is related but around the same time the issue started the needle for my temp gauge had spun around and is currentley stuck below the peg on the low side. The car never overheated or leaked any fluid. I do have 222,000 miles on her. Plan on getting a few more.
This is the supercharged model. I have also noticed that I have to kick her down a little more when going up steep grades, and it seems a little hessitant at times. I am hoping not to have to replace a fuel pump but am thinking that may be the culprit. New plugs, wires, fuel filter installed in the last 15,000 mi. whatta ya think? Open to any help on this matter.