I have a 1998 Kia sportage that died on my son. I am able to get it to start after 30 seconds of cranking, but when you drive it, it dies. We changed the fuel filter,nothing. I noticed that the fuel pump relay contacts doesnt kick in until you actually crank the engine. Don't know if that is normal on a kia. It idles great when you get it started. Any ideas where to start?