Bring add salt to 4 quarts of water and bring to a boil.
Add noodles and cook 5-7 minutes (al dente). Drain and rinse with cold water until cool.
Stir in the bell pepper, celery and onions.
Combine the vinegar, chili powder, garlic powder, mayonnaise, Bar-B-Q sauce and black pepper to make the dressing.
Toss the pasta with the dressing.
Serve and (Or, refrigerate for up to two days.)