1989 caprice help

[cap10longboat]

I've got an 89 caprice that runs fine until it gets warmed up. Then the engine cuts out when you give it gas.(Kind of like your stepping and letting off the gas every 1/2 second) It is sending code 32 and 34. Any idea what this problem is?
I changed cap plugs, rotor, and coil. I have checked all vacuum lines. I'm kind of new to this whole fuel injection thing so any help would be appreciated. Thanks

[maxwedge]

4.3? if so the 34 points to a problem with the map sensor or vacuum to it. 32 is a egr code, stay with the 34 for starters

[cap10longboat]

Sorry, its a 5.0 throttle body. What should the voltage be at the plug for the map sensor? How would you go about checking it?