what does a going out injector sound like? - Diesel Forum - TheDieselStop.com
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Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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Old 03-13-2007, 05:21 PM   #1 (permalink)
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what does a going out injector sound like?

I'm not sure what's going on with my 7.3L. But the other day in the morning when starting it, it sounded like a motor sounds when a plug is out when you turn it over. Hard to describe.

Then while towing the next day under load in OD at 55mph it made this loud ticking noise coming from the passanger side. But only at speed in OD. Sounded like an old 350 chevy with a loose rocker. But after about 20 miles it just went away.

Since then no weird sounds or symptoms. I'm just looking for anyone who's had experience with noises like this. I have stock injectors with 187k on them. Any ideas?

Thanks
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Old 03-15-2007, 08:47 PM   #2 (permalink)
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Re: what does a going out injector sound like?

sometime the armature screws can break or loosen causing the injector not to fire. It can make clattering noises.
Does the truck have power?
if not you most likely have a bad injector.
you can remove the valve covers and look to see if there is oil coming out of them if no oil the injector is most likely bad.
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Old 03-16-2007, 10:07 AM   #3 (permalink)
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Re: what does a going out injector sound like?

Thanks SanAntonio78 ... I got a buddy with a big money Snap-On scanner and we're gonng do a buzz test and cylinder contribution test.
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Old 03-17-2007, 10:50 PM   #4 (permalink)
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Re: what does a going out injector sound like?

Yep a injector buzz and contribution test from any good scanner and it will cycle through and give you specific issues to focus on. How many miles are on your truck? Stock OEM injectors? Does it have the stock o-rings or the updated ones? How about a bit more info if possible?

Good luck,
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