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Injector Test

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Offline SafetyGuy

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Injector Test
« on: January 01, 2009, 02:17:21 PM »
My 1991 1.3L EFI has died. It will run if I pour fuel in the intake and then die when the fuel is gone. I am trying to determine whether it is the ECU, Injector, or the fuel pump. I have checked the fuel pressure and it is fine. How do I test the injector to see if it is good or not?
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Offline Drone637

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Re: Injector Test
« Reply #1 on: January 01, 2009, 11:24:48 PM »
I'm not sure on the 1.3 with the throttle body, but with the Multi-Port Injectors you can hit them with 12v and you should hear a click when it opens. 
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Offline ppltrak

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Re: Injector Test
« Reply #2 on: January 02, 2009, 08:52:25 AM »
Run a test light between the 2 wires that go to the inj. if it blinks when you crank the motor the ecu is prob. ok.

    Kevin
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Offline kubik1981

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Re: Injector Test
« Reply #3 on: January 02, 2009, 05:54:38 PM »
i know it is a diffrent kinda vehicle but i had a F150 that did that and it was a bad ecu
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Offline ack

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Re: Injector Test
« Reply #4 on: January 02, 2009, 10:07:29 PM »
There is a copy of the Samurai 1990-1992 FSM Supplement at Ack's FAQ that deals with TBI troubleshooting.

Do a search for fsm.  The link is in my signature.
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Offline Rhinoman

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Re: Injector Test
« Reply #5 on: January 03, 2009, 10:52:15 AM »
Don't put 12V directly to the injector you will burn it out. Its is a low impedance injector, unlike the 16V injectors. It does sound like its most probably an ECU problem but check the continuity of the wiring back to the ECU.
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