Just bought a 2003 GT. Been sitting for roughly a year. Previous owner said it had oil pump problems. Checked it out and had 85psi. My problem is can't keep car running. It had a quarter tank when I had it towed home. I've changed fuel filter, cleaned mass air flow sensor, added heet, sea foam, and added more gas to try to over come the original gas in tank. Ran a little better but still cuts off 20-25 min. later and won't start back up for a while. Thought maybe adding some octane boost would help. It didn't. It also has rough idle and stalls when put in drive. Pulled codes up. P0190,P1150,P1151,P1152,P1131,P1132. I changed fuel rail sensor and didn't help. Is it really bad gas or fuel pump bad? ANY SOLUTIONS PLEASE??