general problems of the 2008 Mercury Grand Marquis

Vehicle was purchased used in June, 2011. While braking for a stop light, vehicle suddenly accelerated. Had to forcefully pump brakes to stop vehicle from hitting vehicle in front. Car returned to normal operation as soon as I got it stopped. Have had similar incidents a couple of times before, although not as bad as this one, however, at that time I thought maybe I had accidentally pressed the accelerator while braking. I know that was not the case this time.

I was driving on the interstate going about 65 mph. I accelerated rapidly to pass a semi when I was getting close to my exit. After passing the semi I let my foot off of the accelerator but the vehicle did not slow down. I applied the brake pedal but the vehicle kept accelerating for about 5 seconds. After that I heard an audible "clunk" come from the engine compartment and the vehicle returned to normal operation. This is the second time this has happened the first was a month ago accelerating rapidly from a stand still position. In neither case did I wreck or get a speeding ticket.

Unexpected acceleration of 2008 Mercury Grand Marquis, while my foot was on the brake, slowing the vehicle. This happened twice in the past 3 days. Second incident occurred oct. 31, 2008. Each incident nearly caused my vehicle to strike another vehicle.

Just bought the 2008 Grand Marquis, first day, radio did not work, (still does not work properly). Took the car in for oil change 2500 miles, also asked them to check out a noise the car was making. I was just informed yesterday I need a new engine. They the dealer said it was something to do with the timing chain at first the replaced that part and still had the noise. I will never own a Ford product, and they wonder why they are losing market share!!! by the way, this is my 9th Grand Marquis, I just traded an 2005 to get rid of it, it too had a noise they could not fix. Now my wife will not even drive this one when we get it back from the dealer.

The first time I changed the oil in my 2008 Mercury Grand Marquis when I started the engine there was a loud mechanical noise for a few seconds. I took it to the dealer and told him to change the oil and listen for the noise which they heard and was told all 2008 Grand Marquis do this . Also I notice the engine is noisy in the morning when I start it. I think Ford has a problem with these engines if they all do it.