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Old 01-28-2013, 10:49 AM
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Injector maybe?

So a couple days ago when I was letting my truck warm up the idle started to lope and huge amounts of smoke was pouring out of the exhaust so I turned it off restarted it and it was gone. The smoke smelled like diesel and it hasn't thrown any codes yet. This has only happened twice and isnt effecting anything. I'm thinking it could be an injected getting stuck from the cold? Thank you for any idea on what this could be.

Oh and I'm running the spartan 275 with an intake and exhaust. Thanks guys
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Old 01-28-2013, 11:06 AM
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Sounds like it could be an injector. I would get that checked ASAP before it melts a piston. These motors are not forgiving if they are overfueled.
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Old 01-28-2013, 11:12 AM
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Injector maybe?

That's what I thought well thank you I'll bring it in and see what's going on
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Old 01-28-2013, 11:13 AM
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Sounds good. Keep us posted. Maybe its an easy fix
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Old 02-05-2013, 11:53 AM
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so since it wasn't throwing codes and it was rare, i changed the fluids and filters and drove it around for about an hour to make sure everything was normal. I tried to recreate it and nothing so i'm going to start using the the ford fuel additive but it seems like it was a mix of cold weather and running a race tune
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Old 02-05-2013, 12:07 PM
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sorry if im sounding like a newb, but how would to much fuel melt the pistion, wouldnt it melt if running to lean that would do the melting ?
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Old 02-05-2013, 12:10 PM
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Too much fuel makes a hotter combustion which can lead to a melted piston.

I had a sporadic lope idle (not a lot of smoke though) and ended up needing a whole new block a couple weeks ago. Covered under warranty.
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Old 02-05-2013, 12:13 PM
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how bad was your lope at idle? and was it tuned or stock?
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Old 02-05-2013, 12:15 PM
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It would only do it once every few days and would disappear when I would turn off the truck and restart it. It sounded like half of the motor was turned off. Sounded like an old 7.3 with a lope tune.

It was/is H&S tuned.
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Old 02-05-2013, 12:17 PM
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The dealer first thought it was due to rockers. They replaced those and it still had the issue. Ended up having a scored cylinder wall on one cylinder due to a bad ring.
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