Hello...just found your site and it looks like the perfect spot to get some help with the "Grandma Marquis" as my daughter calls it...
The car has 28,000 original miles ...it's the LS Premier version.
A few months ago I had the fuel filter replaced and other than that the car has had standard maint. done to it.
However over the last couple of months I've had random hard start problems.
It only happens when the car has been sitting for several hours....it cranks fine (newer battery btw) but I have to pump the gas peddle while turning the key to get the darn thing to stay running...once it gets running, it runs fine..no hesitations, no stumbling etc.
One morning when I started it, the engine rev'd much fasater than normal, then it kicked back down to normal sounding idle.
Anyone have ideas as to what might be up?
A little research led me to think that the idle air control valve might be messed up? ...If that were the case, is it a pricey fix?
Thanks for any help you all can offer.