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ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: SafetyGuy on January 01, 2009, 02:17:21 PM

Title: Injector Test
Post by: SafetyGuy 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?

Title: Re: Injector Test
Post by: Drone637 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. 

Title: Re: Injector Test
Post by: ppltrak 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

Title: Re: Injector Test
Post by: kubik1981 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

Title: Re: Injector Test
Post by: ack 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.

Title: Re: Injector Test
Post by: Rhinoman 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.