The '87 $32B definition file from Tunercat shows that there is a switch table, a constants table, and 23 other tables. The base pulse width method is checked in the switch table. There is no air/fuel ratio target in the $32B stuff. This leads me to think that the fuel injector pulse width is determined directly from the various tables and sensor values as you drive the car.

The '89 $6E defintion file shows a switch table, a constants table, and 31 other tables. The constants table has a target air/fuel ratio value of 14.7 and many of the other tables work on a percentage change to that air/fuel ratio. So as you drive the car, the various tables that are addressed result in an air/fuel ratio of something other than 14.7.

Do I have this correct?

Can anyone shed more light on this for me?

I have had alot of trouble with the 33 error code, what do I do with a 395 cu in engine using a MAF relating to this error code? What is the theshold constant that Adam referred to in my other post?