In a small saucepan, add ketchup, jam, onion, Worcestershire sauce, vinegar, garlic powder, and chili powder. Stir to mix well.
Bring to a boil, reduce heat, and simmer for 5 minutes uncovered.
Reserve ½ cup of the prepared sauce, and keep it warm for serving later, and transfer the rest to a small bowl to take to the grill.
Prepare grill rack by spraying with Pam cooking spray. Heat grill to medium/high heat - approx 375° - 400°
Put the chicken on the prepared grill with the bone side up. Cover and grill for 8 minutes. Turn chicken over, and grill another 8 minutes, or until chicken is fully cooked. Coat all sides with barbecue sauce.
Serve with the previously prepared reserved ½ cup of barbecue sauce.
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