I changed my radiator about 4 months ago, then my heater went out, so I jimmy rigged fuses for one of my relays that got it working. About a week after that, my car died while it was idling, I had a jump and it started. Then 3 days ago it stalled when I was on the highway. I waited 10 minutes then is started. The next day it did the same thing but wouldn't start at all! I checked the battery, it's good, the connection to it is good, the fuel pump works, I changed my spark plugs a year ago..What could it be??