Visual Inspection
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Hyundai XG350, 2003 Hyundai Tiburon, 2003 Hyundai Sonata, 2003 Hyundai Santa Fe, and 2003 Hyundai Elantra. However, it is still accessible from the selected car via links, so may be relevant.
Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut, see appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article and VACUUM DIAGRAMS article. Also inspect air induction system for possible vacuum leaks.