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1993 Chevrolet Lumina Question: Fuel injector shorts out and kills engine

 

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zahra221, 3.1L V6, Houlton, WI, March 28, 2011, 18:56
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I have fuel injectors that short out and kill the engine.I replace the faulty one and it runs great for awhile and then another one will do the same. I have been installing used injectors. Should i try some new ones or is something else going on. The voltage is in range.Maybe the injector driver in the pcm is faulty and buring out the injectors?

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    patrick mannion from Greg Solow's Engine Room, March 28, 2011, 19:06
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     Master

    I was going to say if the injector is shorting out the driver in the ECU will become damaged but once it is damaged that cylinder would be unlikely to have that injector trigger again. Look and pay close attention to the wiring could it be shorting anywhere or have rodent damage or damage to the insulation due to oil leaks ect....
    With a wiring diagram test the resistance of each injector right at the ECU (with the plug at ECU disconnected, see that they are the same and have no continuity to ground. To get a wiring diagram and trouble shooting procedures, Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info.
    and get an online repair manual subscription. Alldata are great for information, he information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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  • Answer #2

    mastertech6371 March 28, 2011, 20:39
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     Master

    first of all, you need to use new parts. check the resistance of the injectors and compare them to the new ones.

    Roy

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