Truck runs if I unplug the MAP it runs worse if I drive with rpms @ 3000 it runs ok below that it will run ok then very rough (rich,black smoke) then smooth out again back and forth at whim

 

Dude. You have to learn about these things called periods. They signify the end of a sentence. I do not understand what you are telling me. Sorry.
tom

 

96 (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
(R) AIR Bypass (AIRB) not working - Air Injection
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits

Again, sounds as if the relay is faulting either due to a bad relay or bad connection. Over or under-pressure in the fuel rail will contribute to the problems you're describing. So will a dirty throttle body/intake/idle air control.

 

Right below the throttle body, on the front of the engine, around where the coolant hose comes out. You should see two sensors in the engine block. Here is a picture. Looking at the front of the truck, you want the sensor on the left. Unplug this sensor, and plug your map back in.

Here is a picture of the sensor.

 

there are two relays with the same pin configuration. One has a black plug one has a green plug. Which one is the fuel pump relay. Also I replaced the MAP sensor no improvement.

 

A new code 14 pip?????

 

PIP would be the TFI module on the distributor. It could be going bad - they do fail a lot, and often in bizarre ways.

 

If you don't have one, get a wiring diagram for your truck. The color coding on the wiring will tell you for sure. I say this because I forget if the black one or the green one is the Fuel Pump / ECU relay (they are right next to each other, but I forget which is which, and what color wires you should look for).

Bad connection or bad wiring to/from the TFI module, module is failing, the stator/pickup is failing (inside distributor), or you have a bad ground connection somewhere - specific to the return of your PIP / TFI module signals.

 

is the TFI the same as the Ignition module?

 

The cover over the relays and fuses has a legend to identify the contents.
TFI stands for Thick Film Ignition, so, yes, TFI is the ignition module.
tom

 

They must've started doing that in '88 or my legend is worn off on my '87 BII... I don't recall seeing that on the underside or the top of the cover, nor did I have any fuses in the engine compartment (other than the one on the negative wire that goes to the neg. battery cable to the radiator core support... or to the computer or some such, I forget where it goes exactly), just fusible links. Whichever relay is for the fuel pump should have an Orange with blue stripe wire going from the contacts to the inertia switch, if I am not mistaken. I don't have my wiring diagrams in front of me, but that sounds about right.

 

would a ECM from a 88 2.9 with a manual transmission work in my 88 2.9 with an automatic? or does everything need to match - transmission,4x4 etc.?

 

It would work, but I believe over drive would not function There is no reason to replace your computer. It is a sensor problem/electrical problem. If the computer as at fault, your truck would not run at all.

 

Yeah, overdrive would not work. Need the same computer for same computer to swap. And to add to this, it's not necessarily true that a partially faulty ECU will cause the truck to not run at all. Sometimes, part of the ECU assembly gets messed up or a connection is bad, etc. and causes problems. I do agree that all the sensors and connections need to be thoroughly tested and checked before ECU replacement is considered.

 

Need a PCM anyone have one they'ed part with?