Low injector voltage

Asked by Jul 13, 2017 at 12:28 PM about the 1980 Nissan 280ZX

Question type: Maintenance & Repair

I swapped a 280zx l28e into my Datsun
720. And have it hooked up about 95%
correct I believe. My injectors have the
power but it's too low for them to pulse
correctly. What would cause this voltage
or ohms drop. Seems to be a common
problem really wish someone was a pro
on these.

2 Answers


You may have an injector with high resistance, disconnect the injectors and recheck the voltage, if it is still low then start tracing the power wire back until you find the bad spot. If it goes back up then start ohming the injectors till you find the one or more causing the problems.

I tried chasing it and we got injector pulse lights to check and the voltage is staying around 2.5 needs to be around 3.5. I'm going to trace the hot wire

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