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O.K. here I go, I took a engine out of a 1976 280z and put the engine into a 1977 280z, The motor was running fine in the 76, but now the injectors will not put the gas into the motor.I can pour gas directly into the intake and the motor will run till that gas is all burned up.There is gas in the fuel rail under pressure so I know the fuel pump is pumping, it just won't get it passed the injectors. The only difference I nocticed in the two cars was that the distributor on the 76 had three wires coming from it and the the 77 only two. I changed the distributors around, didn't help. And last but not leasest the plug on the wiring harness that goes into the main computer is a little different, both of the computers will plug in with no problem but one computer box has more prongs were the harness plugs in, does this matter?
Any help or advise will be gladly accepted. God knows I need it!

Thanks Paul.
 

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The ECU is not getting a signal from the crank angle sensor in the distributor. You probably need the exact wiring harness and ECU from the doner car so it still thinks its at home.
 

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put the 76 ecu in
im assuming u are using the 76 afm
if that doesnt work swap efi harnesses
 

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Paul,
First off your ECU doesn't use a crank angle sensor. Second ECUs are the same for the two years (I have a 75 in my 77) so that's not the problem. If the injectors aren't firing then it's either the connectors to the dropping resistor or a bad ground. The injectors should get a hot signal with the key in the ON position. Then the ECU sends a gruond signal to open the injector for a set amount of time. If you have a bad ground then the injectors won't fire. Do a ground pin test on the wires to your ECU to find if this is your problem. Hope this helps,
Jim
 

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Ok, here's the situatuion now, If I disconnect the wiring harness from the computer, I can hot-wire it and hear the injectors run, but they will not run through the computer. Anyone got any ideas about what to do next?
 
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