I just picked up a 1977 280z with a wiring harness for a "Neutronics" system. It looks like it connects to the o2 sensor on the exhaust and possibly the ignition coil.

I cant find a single google search about this system or a wiring diagram. I have a black, red and green wire disconnected. Any help would be greatful.


If more infomration is needed this is a EFI car. I am trying to get it started. can get it cranking but thats about it.

Provide some details about the car. Is it a California car with a converter or is it a Federal car without? There will be a sticker on the door jamb that says Catalyst or No Catalyst.

I found the patent describing the concept. If the system follows the patent there will be some hardware attached to the air intake system after the AFM. Attached below.

If it was mine I would disconnect it and get the wiring back to factory stock in order to simplify things until you get the engine started. There are numerous reasons that it might not be starting. Start with the basics - power to the coil, spark, tach signal, etc. Download the 1980 EFI book and do the electrical tests. Try starting fluid if you have spark. Make sure the fuel pump is working, etc...

I'd also start a separate thread where everything you try is contained. Sometimes people start multiple threads and you can't tell what's been done. It can take a while to get things right after an EFI car has sat.

https://patents.google.com/patent/US5163412A/en

"Pollution control system for older vehicles

Abstract

A pollution or emission control system for retrofitting on older vehicle engines includes a catalytic converter with an in-built oxygen sensor for mounting in the exhaust line, and a supplemental air input line containing a control valve for connection to the engine intake manifold to control the amount of air supplied to the engine. A computer monitors the oxygen sensor output and the engine speed, and controls opening and closing of the control valve according to the detected conditions. The computer also controls the speed at which the valve is opened or closed dependent on the engine speed and optionally the engine temperature, so that the valve can be closed faster at slower engine speeds and opened faster at higher engine speed. The computer is additionally capable of producing diagnostic telemetry, both digital and analog, to assist installation of the invention and test for proper operation once installed."

p.s. Neutronics Enterprises is still out there.

Check out the email addresses here - https://neuracing.us/brushless-motor-engineering-and-manufacturing-based-in-sand-diego-ca/

Phone numbers - https://dieselnet.com/com/85.php

Stop by and say hello - https://www.mapquest.com/us/california/neutronics-enterprises-inc-366412161

Here's a book that references the patent - https://link.springer.com/chapter/10.1007/978-981-10-5903-2_124