My 2004 Santa Fe starts but stops running immediatley. There is no visual damage, loose wires or anything I can see. Could this be a fuel pump problem?

 

More likely a sensor problem... maybe crankshaft position sensor? throttle position?

 

Hyundai has some problems with the crankshaft posistion sensor. Located on the front of the block next to the starter on the V6.

 

I've got a 2002 4l Auto 2wd - same issue - starts up but only runs for exactly 3 seconds then dies. Did yours get fixed? What was causing the problem?
I already have a new Cam sensor, Crank sensor, spark plugs, and timing belt.