Hi I am on my second GTP after a guy totaled my other one after only 7 weeks.I rode 2 hours to look at a 98 GTP yesterday and bought it.On the way home I took the interstate for about 70 miles with no probs.I stopped at a gas station for a break and noticed a rattle from the drivers side.I went in and when I came out the car started up fine.When I backed out and put it in drive to leave it stalled out and would only turn over for 1-2 mins and then started up and ran fine.About 4-5 miles up the road I stopped for a stop sign and when I went to pull off she stalled again.It was 3-4 mins of trying to start (not continuously but evert 30 secs) it started and ran at highway speed just fine.I only did rolling stops the rest of the way home.It was late so I went out this morn and started it up fine but the car lunged forward when it crankes in park !? I have not drove it again on the street because I don't want to get stuck or stall in a bad situation.Any suggestions as to what the cause is????????