Found a code reader at a local autozone. Got:
63: Throttle Position Sensor (TPS)
10: (pause)
22: MAP sensor

I need to figure out where these sensors are and how to test them. But, generally, any tips for this code combination? Plan of attack? The truck starts, runs, and just passed emissions, but is unbelievably slow- 0-60 is 31 seconds!

 

In this link Electronic Engine Control - ???Gary's Garagemahal page 56 and 57 are your electronic engine control. Look on page 57, you can see the manifold absolute pressure sensor and the throttle position sensor. The long rectangle thing below them is the computer.

Scroll down in this link, the diagrams will have a list of components and their locations. This is on page 63 in the link. Look in the list, it tells you the location of the MAP and the throttle position sensors, and it also gives you another page all the way to the right that has a picture of it. You can click on this link to find all the pages. 1986 EVTM - ???Gary's Garagemahal

 

P.S. Make sure you have a good vacuum line going to the MAP sensor, no holes and connected properly.

 

That is a great resource, thank you. Vacuum connection to the map sensor seems pretty solid. TPS sensor tests bad with my multimeter, so I'm starting there. Unfortunately, none available locally, so I have to order it.

 

The MAP sensor on my son's 1984 with 4.9L went out and the symptom was there was pinging under moderate load. Once replaced, it ran normally. The TPS is located on the inner fender near the battery [passenger side]. The Throttle Position Sensor is located on the throttle shaft nearest the radiator. For these items, I recommend Motorcraft... they can normally be found as NOS on eBay.

 

I think he means the MAP sensor is located on the pass side inner fender. My typos are getting more frequent also. My excuse is I am getting old.

 

Thank you, Sir! I made the correction to my post.

 

Fix the first code... the others may fall into place.....