Hi all. i have a 1991 chevy corsica. 3.1 multi port fuel injected. the car sat for 1 year, and when i put it back on the road the car ran good for a couple of months. then one day i wanted to go up town, and it wouldnt stay running. i had it taken to a garage and they checked the fuel pump, and that was good. and they replaced the fuel filter, and still couldnt keep it running. they the replaced the wireing harness underneath the intake, cause of some cracked wires, still not the problem. now its hard to start and once it starts, you touch the gas it stalls every time. what to do i'm ready to junk it...