what would cause my car to have alot of loping during idling and while driving

No! I do not have a check engine light on. it would be nice if i did, that way i would look up a code.

Just because the light is not on doesn't mean that it has no codes. Get it scanned by a real scanner.

I don't believe there is a timming belt on this car. i've been trying the highest grade gas fot the last month hoping that might help. but it getting costly,