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  #1  
Old 10-02-2012, 12:42 AM
rokinfarmer rokinfarmer is offline
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7.3 liter diesel

When i get on my 7.3 every once in a while it will kinda white smoke, it has 176,000 on it and doesn't black smoke a drop, what could be causing it?
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Old 10-02-2012, 09:57 AM
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Does it feel like it is missing while you see the white smoke?

White smoke is unburnt fuel. You could have a loose UVCH on one side. Check all the wires going over the VC to make sure no chaffing is going on. Could be injectors.
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Old 10-02-2012, 10:13 AM
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black smoke is unburnt fuel in a diesel not white, white usually is coolant leak
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Old 10-02-2012, 10:32 AM
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Quote:
Originally Posted by SuperDutyScaler View Post
black smoke is unburnt fuel in a diesel not white, white usually is coolant leak
If he had a 6.0, yes...

Since this is a 7.3, you may have an injector that's headed south or your UVCH may be coming loose.

You may also need some new o-rings on your injector. Depending on how old it is, you may just replace the injector with a reman one from Clay: Riffraff Diesel: Stock Rebuilt Injectors
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Old 10-02-2012, 10:43 AM
rokinfarmer rokinfarmer is offline
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Its has plenty of get up and go power and has never smoked, how could i figure out which injector to replace? Or just replace all 8? I just rebuilt the hpop and put new o rings on lines and fuel housing, and what is the UVCH?
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Old 10-02-2012, 11:14 AM
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Scroll down to Buzz Test.
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Old 10-02-2012, 12:04 PM
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i just read it but it doesnt tell us how to do the buzz test? my dad would like me to do this but i dont know how?
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Old 10-02-2012, 12:53 PM
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Quote:
Originally Posted by SuperDutyScaler View Post
black smoke is unburnt fuel in a diesel not white, white usually is coolant leak
Black smoke is poorly burnt fuel, white smoke is unburnt fuel on our 7.3
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Old 10-02-2012, 03:19 PM
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Quote:
Originally Posted by SuperDutyScaler View Post
i just read it but it doesnt tell us how to do the buzz test? my dad would like me to do this but i dont know how?
Apparently you need a scan gauge that performs the buzz test. You can search on Youtube "7.3 injector buzz test" and get an idea of what's going to happen, what to look for, codes and whatnot.
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Old 10-02-2012, 05:08 PM
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rokinfarmer, where in texas are you located?
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Old 10-09-2012, 11:23 AM
rokinfarmer rokinfarmer is offline
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And what can i do to stop it from black smoking?
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Old 10-09-2012, 11:23 AM
rokinfarmer rokinfarmer is offline
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Im in galveston
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Old 10-09-2012, 12:02 PM
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If your truck can make it, I can meet you somewhere around FM 1960 or somehwere in Katy.

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Old 10-14-2012, 11:41 AM
rokinfarmer rokinfarmer is offline
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When my truck is just at an idle i smell raw diesel so what is causing that?
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Old 10-14-2012, 11:47 AM
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Raw diesel at the tailpipe, in the cab, or standing in front of the truck?
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Old 10-14-2012, 11:47 AM
 
 
 
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