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fuel injector modeule (computer)

jimmypleitez

Entry posted by jimmypleitez

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so i have a 1976 Datsun 280z that just doesn't want to start up....I work at a tire shop and my mechanic says its the fuel injector control module....if anyone knows, how do I know when my control module is no longer working properly.......

HELP ASAP

ANY HELP GREATLY APPRECIATED

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Nissanman

You need to check for the injector pulse.

Either listen for the injector "clicking" or remove the wiring connector and check for the pulse with a 12V meter or test lamp.

The injectors should get a nice healthy 12V pulse to operate them when you crank the engine.

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Nissanman

You need to check for the injector pulse.

Either listen for the injector "clicking" or remove the wiring connector and check for the pulse with a 12V meter or test lamp.

The injectors should get a nice healthy 12V pulse to operate them when you crank the engine.

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JimmyZ

There's a book called "How to Tune and Modify Bosch Fuel Injection". It has some excellent troubleshooting advice. It also explains the system very well. There are many threads regarding 280Z FI probs.

Since the injectors are pulsed on/off the voltage will actually read below 12V. An oscilliscope ($$$) would show a 12V square wave though.

Make sure you have spark since the dizzy's P/U sends a signal. There are other simple things which can create no signal. (Sensors etc)

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