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Question Regarding Fuel Injectors

Hi, I've always wondered about something, but never really done it. Regardless of the year, make ,and model of a car is it possible to check fuel injectors in the following manner? For example a 6 cylinder car. 1. Disable the ignition so the car doesn't start. 2. Disconnect the fuel rail from the engine, but leave the injector wiring and injectors connected to the rail. 3. Suspend the rail above the engine with the injectors hanging down. 4. Make up some sort of supply line to connect the suspended rail back to the engine so that fuel can reach the injectors when the engine is cranked. 5. Put a pan under the injectors to catch the fuel and crank the engine. Logic tells me that this would work, and it would be a good way to observe the spray patternof the injectors, and to see if all the injectors are firing. I'm an amature mechanic, but very I'm interested in hearing what the pros have to say about this. Thank You

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  • lightingboy1 Feb 05, 2009

    Thanks for the answer and quick reponse. How about the danger of fire or an explosion?



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IT IS POSSIBLE and has been done. as long as when you disable ign it does not cause pcm to disable injector pulse.when you first cut key on they will spray a shot also. it is also a good way to check for a leaking injector,see if one drips after sitting a while. however if you have fire with a noid light and injector is not hitting it is most likely a bad injector

Posted on Feb 05, 2009

  • TripleTauto
    TripleTauto Feb 05, 2009

    this is always a hazard. this is why you have to be sure ign is disabled



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