Russ, much easier for you to try and find the MAF rather than figure out the type of FI system you have. If you have an MAF then you don't have a MAP.

Here is a link to an online catalog from a company that offers replacement MAFs for later model vehicles. It may shed some light on the issue. If you notice on page 3 of the catalog the company does offer a replacement MAF for the '90 2.3L Ranger engine. Also, if you go to last page of the catalog you can view several pictures of MAFs which will help you get a better idea of what you are looking for.

Link to MAF Catalog

Hope it helps!