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AFM/ECU questions

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I have searched the forums and Google.  More than likely I am just missing what I am looking for, but here is my situation:


I have a 1979 280ZX built in 11/78. 

When I bought the car the AFM was out, and it looks way too clean to be original. 

The car starts with the AFM installed but not connected to the ECU (runs really rich with black smoke).

As soon as I plug the AFM into the ECU, it starts to sputter and then dies


I don't have tons of tools to run tests on the electronics, so I am wondering if anyone can tell me:

1) How to tell if the AFM is the correct AFM for the ECU

2) If it is obvious what is wrong and I'm just an idiot :)

3) Do they make aftermarket systems that I can just replace everything and save myself the headache of diagnosing the problem.  LOL


I appreciate the help!

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Download the 1980 EFI manual and run the tests for 1979.  It has tests for all EFI engines up to 1980.  This will tell you if all of the critical parts are connected properly.  Seems like your coolant temperature sensor might be disconnected.


If you get some parts showing as incorrect, use the FSM to find out where they are and how they should be connected.  Engine Fuel chapter.


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