Smoky box? - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 03-07-2012, 10:10 AM Thread Starter
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Smoky box?

What does white smoke coming from the air box after the truck is shut down mean?

2012 F250 XLT
Crew cab short box
6.7, 4x4, 3.31 ELD
Cab lights, Grey metallic, black cloth.
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post #2 of 4 Old 03-07-2012, 10:13 AM
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Before the turbo and after the air box is the crank case vent. It normally is sucked into the motor, but it's just going backwards cause there's no suction

My Samsung SGH-I997 made me send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #3 of 4 Old 03-07-2012, 02:22 PM Thread Starter
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I've got it narrowed down to a burnt valve or a leaky injector. I know I can do a compression check to test the valves, but how can I test for leaky injectors?

2012 F250 XLT
Crew cab short box
6.7, 4x4, 3.31 ELD
Cab lights, Grey metallic, black cloth.
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post #4 of 4 Old 03-07-2012, 03:34 PM
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Why do you think it's that? Excessive blow by?

My Samsung SGH-I997 made me send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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