buzz test - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 02-18-2007, 03:43 PM Thread Starter
 
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buzz test

just one small ? when a buzz test is done you can hear the inj. buzz but if the uvc harness is bad will the inj. buzz at all or slightly :thanks:
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post #2 of 6 (permalink) Old 02-18-2007, 04:52 PM
 
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On a buzz test all the inj's buzz at once 1st then in I think firing order one at a time.When the test completes it will tell you which one or ones didn't buzz out.
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post #3 of 6 (permalink) Old 02-18-2007, 05:00 PM
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The injector "Buzz Test" checks the WIRING in the harness, UVCH, and injector coil for proper current flow. It is done in numerical order, and if you fail to hear one, you have a dead injector.

Cold oil can make the buzzing very difficult to hear especially if there is any significant background noise.

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post #4 of 6 (permalink) Old 02-18-2007, 06:54 PM Thread Starter
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i heard it buzz just didnt sound the same as the other 7
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post #5 of 6 (permalink) Old 02-19-2007, 12:22 AM Thread Starter
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cheap fix rewired the uvc connector thx all
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post #6 of 6 (permalink) Old 02-19-2007, 11:52 AM
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I'll complicate things further.
When I was trying to find a problem with my truck, I ran a buzz test with ALL 8 INJECTORS unplugged. Buzzed 8 times and passed the test.
I think it tests the IDM and not the actual injector solenoids...
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