Sammyhood

We just purchased a 1983 Toyota Sunrader and are dealing with a very bad odor that we don't know what the source is. We have taken the carpet out thinking that was the problem but so far that hasn't helped. Has anyone else had this experience. Would the wood that the cabinets are made of, or glues, or insulation cause a bad smell. We have aired it out for three days and it is still bad. There is no apparent water damage or leaks.