The foregoing covers the diagnostic procedures and common problems associated with the speed-density/MAP-based systems on your earlier Corvettes. Next month we'll cover MAF-sensor diagnostics and ...

First, you can check for codes, but like we just said, many times a failing MAP sensor won't throw a code until it has died altogether.

One dirty sensor could be hurting your car’s performance — learn which one it is, the symptoms to watch for, and how to clean it easily.